I parked in a car park that had machine that you needed to enter your full registration. I had never used these machines before but I entered my full reg, paid 40p and my ticket was printed. A week or so later I received a parking charge notice, I was being fined for 'maximum limit exceeded' I checked my ticket (luckily I still had it) and I had left four minutes before my time ran out, so I appealed.

The appeal was refused as they said I didn't enter my full reg. Only the last four characters of my reg was printed on the ticket (I didn't realise it would have normally printed my reg in full as I hadn't used the machine before, the sign just said 'enter full registration' which I did).

I know I had entered my full reg so not sure what happened but I do know 10 mins after I had used the machine it wasn't used again and seemed to be out of order. I appealed to POPLA but lost the appeal.

The parking firm has since changed the wording of why I was being fined to 'payment not made in accordance with terms displayed on signage' and they want £100 in 14 days. What should I do?