I use the PayByPhone app to park in my area.
All the car parks in town are now covered by this app.
The 4G in the area is so bad that you can pay online but it just gives you a spinning wheel and then a few minutes later you may, or may not, get an email confirmation.
So if the transaction fails you may not know until it's too late.
There is only the usual crappy smiling bot access - I can't find an email or a phone number. It strikes me that if a company is representing the local council, takes your money but is based on unstable connections, and capable of pretty aggressive fines - there should be a real contact potential - but there isn't.
This seems to be the way if so many companies.