Free Traffic Legal Advice

Hi.
I hope you can help me.
I had a text yesterday morning.
It just stated Marstons and a ref and telephone number.  Normally I'd ignore these, but, I have used the Dartford crossing on 14th February, paid, but then  last Saturday received a notice of non payment. I telephoned, and stated I had paid, they had no record so they said I should send proof of payment which I did.
Back to the text. I googled the company, found out it was a bailiff and being concerned that it was something to do with the dart charge called.
I've never been so shocked at how bullying, aggressive and railroading this call turned out to be.
I gave the ref asking what it was about, and was asked for all sorts of info. Previous address current address dob. Etc etc.  I kept stating you don't need this info, I just need to know what this is about. But she insisted that I give this jnfo before telling me.
It turns out it was a pcn for Hackney Council regarding, I think a bus lane violation. Every time I tried to clarify she was just aggressive and very unhelpful.
So it's a pcn, Hackney council 3rd May 2024.
That was a day I drove from Yorkshire to London to see a relation, before I drove to the channel tunnel, I was driving to Italy and would be away for 3 months. (90 day rule for Eu) So it made sense.
The woman then went on that the pcn was for 3rd of May and was sent to an old address which she stated the Dvla updated 10th May.  It was as though she was taking great delight in the fact that it was issued to an incorrect address and that I knew nothing of it. I don't know if Marstons had found this info or Hackney?  I stated that I knew nothing off this, and she said, you owe £560 today or we are sending bailiffs. Obviously I said no I'm not paying until I look into this. I also asked how they had my telephone number? Hackney council couldnt have it? So how did they get it. My number is verg private. I dont have it on social media etc etc.She evaded this question. I've had absolutely zero correspondence from either Hackney or Marstons to date. Various other threats of bailiffs visiting etc and I ended the call.  It was literally like trying to get blood from a stone asking questions.
I then went on their website entered the number and it stated I " owed" £280!
I then started googling of this was a scam.
I felt very bullied and threatened.
After a bit more googling I decided to send a SAR request through the ico website. This was last night.
I've recieved 2 emails and a further email for a document sharing site. I've not been on this yet.
In the Sar I particularly referenced that I wanted the transcript of the call yesterday, as I can't believe this was a legal or moral way to go about anything.  I merely called for info on something I knew nothing about.
So my questions.
Is it legal or representative of code of practice to deal with an enquiry in that manner and using those methods?
How did they get my Telephone number?
Is it worth appealing to Hackney Council. Did they know about my address change? Did they not follow procedure.
Also, even if when I returned home after 3 months away and I had recieved correspondence, I would have been out of town.
Footnote
I'd had a huge amount of problems with Dvla and changing my address etc, so much so I'd had to put numerous complaints in. I even wrote a review on Trustpiolet regarding how difficult they were. They didn't respond to my complaints either.  At the end of March I finally spoke to someone that helped and they changed my address, but it appears records were not updated until 10th May.
So what do I do now. Do I appeal to Hackney. Write a seize and desist to Marstons?  Any rules and regs I can use?   If they state they did send to my new address, which I don't believe they did, and have never recieved anything, did Hackney follow the correct protocol. Should they have rechecked the address after the first notice sent and they didn't get a reply. It seems to me that as I recieved the text from Marstons yesterday, that possibly they have only just taken on the case.  Also threatening bailiffs, does it need to have been to court first. I've had nothing from any court?
Sorry for the ramble.
And many thanks for reading and any help.

I don't know. Maybe the Sar will reveal it
What difference does it make to my question?

The ref isn't the pcn. 
Yes I know my cars reg number. But I don't see how it's relevant.  Plus Marstons may read this forum

So the woman on the phone shouldn't have said what she did. Ie we will send the bailiffs if you don't pay now

They may not have your address (yet). They have to serve the enforcement notice of £280 on you before visiting (which then adds an extra £235, so you don't want that).

I don't think the text you received qualifies as an enforcement notice but others will comment.

If we can get the ducks in a row we can advise.

£280 indicates a London PCN that's reached the bailiff warrant stage.

£130 = PCN
£65 = PCN Charge Cert surcharge
£10 = Court Registration fee
£75 = Bailiff's Notice of Enforcement

You're missing the original postal PCN, the Charge Cert, the Order for Recovery and the Notice of Enforcement. They can't all be lost in the post. Your story indicates that the name & address on the V5c registration document for your car is incorrect or otherwise incorrect.

Or sometimes the car is leased or maybe a company car and the PCN and subsequent docs have gone to the lease or finance company or your employer and they have not responded.

So are your the V5c holder? If yes, then check the name and address. Don't just assume it's right, dig it out and check the name and address.

The bailiff, Marston, can only enforce at the address on their warrant. If they cannot enforce at the address they have then they will try and discover your current address and ask the Council to apply to the Traffic Enforcement Centre at Northampton County Court to have the warrant re-issued (re-sealed) against your current address. That's why she was anxious to discover your address.

However the bailiff can still clamp and impound your car if it's found in a public place even if the warrant address is incorrect. Such as on the street.

From the first post I detected that there may be an address change around the time of the PCN which is why I asked for the VRM. We don't have the PCN number yet.

More to the point should the £280 be paid now the address is out of the bag.

So once again, what's the car's reg?

Please have a read of the READ THIS FIRST - **BEFORE POSTING YOUR CASE!**

The instructions on posting documents are very clear and you are explicitly asked not to redact PCN numbers and the vehicle's registration mark.

Marston's already know the VRM and now they also know your current address.