Pre-paid to park in the Long Stay car park at Newcastle from 2 - 9 October 2022. Got our ticket at the barrier and then searched for a parking bay which took 5 minutes or more. On our return we arrived at the exit barrier,inserted our parking ticket which was swallowed by the machine,but the barrier didn't open. On the screen where you insert your ticket it said we owed £122 for parking. Had to motion drivers behind us to reverse so we could clear the barrier,before going to the manned office situated near the barrier. Fortunately we could produce the pre-paid print-out of our booking and the barrier operator let us through. Not good! I was also charged twice when I made my booking although after contacting customer services, the second payment was returned to my account within 5 days. Room for improvement???