Took £8.50 for "start/stop" parking (max period) when I wanted £1.40 worth.
Couldn't stop parking as every time I phoned it tried to get me to buy new parking.
Eventually customer services admitted my account was "locked" (they couldn't tell me why or what this means) and that I would get the difference refunded. It would be down to my bank whether this was minutes or days.
1 week later and still no refund!