Southwark have rejected my representations and are in danger of being removed from my xmas card list.

Their reasons are below. What do you reckon? Accept defeat or keep going?

We sent you a PCN because our CCTV camera evidence shows your vehicle going where motor vehicles are not allowed.
The sign, on each side of the carriageway, is that prescribed by Diagram 619 at Item 12 in Part 2 of Schedule 3 to the
Traffic Signs Regulations and General Directions 2016, as indicating ‘Motor vehicles prohibited’. The sign is round, white and
has a red border. Below are the words '' except for loading 7am -10am, buses and taxis. The restriction is in place at all
times.
In addition, to the restriction signs, which are displayed on both sides of the carriageway, there are advanced warning signs
in place advising motorists approaching the junction giving the driver sufficient time and room to change direction. The onus
remains firmly on the motorist to observe the relevant signage and to seek alternative driving route to ensure compliance
with the restrictions in place.
With regards to your comments that the PCN is invalid due to the wording and website conveying the wrong information.
Southwark Council is satisfied that the wording on the PCN is compliant and correctly conveys the 28 day period required by
law.
The wording on the PCN is correct in reference to the provisions of Section 4 ((a) of the London Local Authorities and
Transport for London Act 2003. This paragraph is concerned with the wording which must be included on a PCN; the
relevant period is inferred in article ((a)( i) that the penalty charge must be paid before the end of the period of 28 days
beginning with the date of the notice.
Paragraph 5(2)(a) under Schedule 1 is not concerned with the wording on the PCN, it is concerned with the actions of the
Enforcement Authority when enforcing the PCN. This section refers to the relevant period for issuing of the Charge
Certificate. The act of issuing a charge certificate is distinctly different to the wording which must be included on the PCN.

I parked here on Friday night just gone (further down, definitely in a loading bay). I did notice on my way past that the loading until 6:30pm sign that I was parked under when I got this ticket has also been removed now (post #33). Not that it is of much relevance to me now, but why on earth are they removing the signs?
I'm working away all this week, so I'll use my evenings try to figure out what to do next to take it forward to tribunal. Cheers.

https://www.ftla.uk/civil-penalty-charge-notices-(councils-tfl-and-so-on)/westminster-parking-ticket/msg129130/#msg129130

By way of a clue - it might be worth providing us with the location of said shop perhaps with a link to GSV?

Thank you. Would it be an issue to send it early, before they register the debt,?

Is the paved pavement outside a shop their private property or is it owned by the Council?

I have received a PCN for parking on the pavement in front of a shop for less than four minutes.  There were no signs visible at the time indicating that this was private property that I could see and the shop was closed at the time.