I parked at a bay operated by the RingGo pay by phone system. I followed the instructions on the parking sign. ie. I phoned their number and provided my car details which were confirmed correctly by the phone robot. I then entered the location code and the robot replied "Location not recognised please enter the 4 or 5 digit code displayed on the sign " I repeated this 4 times and each time the same error message, so I gave up. As I had reported my car details and the parking location, I was happy that I could make a payment by some other means and went to the meeting I had to attend. I got a PCN. I appealed it with the LB of Richmond Upon Thames and they rejected it saying RingGO confirm there were no reported faults on that day. I appealed to the London Tribunals and showed them the 700+ complaints against RingGo on Trust Pilot, and they disregarded them. So I have paid forced to pay £110 because RingGo's system failed. No alternative method of payment was available at the location. I intend to take LB of Richmond Upon Thames to Court. Any advice would be greatly appreciated.