Local Authority

Hope someone can help! Friend and I went shopping, she paid for 2hr ticket and we went off on our merry way. She forgot her store card and went back about an hour later leaving me in the shop. I then get an hysterical phone call saying that she had been given a PCN and that I had to come back to the car coz the guy told her to go to the office to sort it out. When I got back to her, it seems that even though we paid for 2hrs, the ticket only showed 1 hr, she had explained this and the guy told her that she needed to go to the office and they would sort it out. Anyway, we couldn't find the office and had to leave so I could pick up my daughter. Having looked at the "Penalty Charge Notice" I have noticed that the make of the car is wrong, they have the right reg-wrong make:-o It also says "by parking attendant...." and there is the guys code then "Signature/Initials...." but it isn't signed. Is there anything she can do?