Ooh sorry, duplicate link, was typing for a long time while watching telly!
Yes my daughter had one on a retail carpark when she went to halfords once saying she stayed for 5 hours instead of the 2 allowed. It is camera operated and she went to halfords for 15 mins and left but then went back some 4 hours later for another 15 mins. The camera CONveniently did not see her leave the fist time - or see her arrive the second time.I took me a whole world of crap to get it cancelled, I took it up with the halfords manager who at first batted me off to the car con park people but in the end he could do without my shit and so dealt with it my telling the carpark scum that it was a staff car.As evidence of leaving we had phone text conversations saying things like "we are outside to post office" proving she was not there for 5 hours. Since then I have refused to go to the same carpark twice in the same day if it has ScamerasThese carpark companies are the new cowboy clampers, who look all professional whilst operating out of the back of some pub somewhereI came across this when looking into it http://www.moneysavingexpert.com/reclaim/parking-ticket-appeals
esetest did they send you a picture of your car with the info
did you buy anything at another shop that you have a receipt for - maybe that will help, proving you was not there