I'll try to summarise but almost too frustrated to type coherently

Year and a half ago I got a ticket for parking in a 'yellow space' not a 'white space' in my car park - where I have lived for 6 years.

The first ticket thing only said I wasn't showing a valid permit. So I didn't take it seriously. As I have one.

When the next escalation came through and I made contact. I then found out it was for this petty reason. I appealed, trying to reason with them that it was a one time slip up, tried contacting the solicitor more than once they palmed it off to. Didn't hear back.

Thought it was over with. Then more recently had a letter wanting a mediation call where I tried to explain again the ridiculousness. Is so extreme for what it is. The company managing the car park isn't even operating there anymore. And I have pics of cars abandoned for weeks with no permit even showing. No tickets. After the call neither party has changed stance but I have got an email for the solicitors who now apparently are willing to have a dialogue

Not like I've parked in a bus lane in town or disabled bay blocking a business. If I had - I'd take it on the chin. But I was 3ft away from where it's no issue at all. Asked residents and flat company and they agree, not heard a good reason even for the different spaces.

Am I a hopeless case waiting for someone like a lawyer or judge to see this for what it is. A farce bordering in extortion. Punishment not fitting crime etc etc. Have a heart...... Or am I just a meal ticket now to the system. Is there a threshold for them to avoid court. They want probably £300 out of me now....I'd pay it in 12p installments

Link for image of my basically empty car park I parked in red Cross. Not red circle. I criminal.

Any useful advice would be appreciated! I really don't want to roll over on this one.

Hopefully link works https://imgur.com/a/K5SvzU5