Free Traffic Legal Advice

Last week I booked parking on my local high street using Ringo app. I accidentally booked it under the wrong car registration plate. I tried using the app to correct the booking. But it wouldn’t let me. I ended up getting a parking ticket. I have proof of my booking (even if the registration plate is wrong) and I also have proof the app wouldn’t let me make the change. What is my best course of action to appeal this PCN? I would be grateful for any assistance. Link to PCN below:
https://share.icloud.com/photos/0bbybQz8S_DICi2XCFaNSSybQ

Unfort I didn’t think to take a screenshot / evidence at first as I was busy trying to find a different solution. It was much later that I thought to take a screenshot and by that time the error message said “sorry vehicles can only be changed within 15 mins of the start time”. So that’s the only screenshot evidence I have

This recent appeal for a similar case was successful (different council though):  https://www.ftla.uk/civil-penalty-charge-notices-(councils-tfl-and-so-on)/barnet-council-stayplyton-road-car-park-10-second-overstay/

So worth a try!