Free Traffic Legal Advice

The Driver parked in the car park on the evening of 26/05.

https://maps.app.goo.gl/9hcpei5atw5tTJiVA

The app (RingGo) wouldn't let them pay (for the next day - 27/05) because "parking was free at that time". The app then was glitchy when they tried to pay the following morning (possibly connectivity issues). Eventually they were able to pay at the fourth time of trying at 09:08. There was no way to "start" the session from earlier - but they paid the full day rate.

Windscreen ticket on arrival back to the car. Any advice on how to appeal much appreciated.

Yes, aware that it starts at 8 - hence trying to do it the evening before. And then multiple times between 8 and the eventual successful attempt.

No, no screenshots.

Returning to the vehicle was difficult due to other commitments - it was assumed that the app would work.