Clamping issue

[Jimbo]

Can anyone help me out here. I commute from Newbridge to Dublin Mon-Fri. I returned one evening to find my car clamped. I did have a valid parking ticket but it had obviously fallen on the ground. I called the clamper who was still in the car park and he took off the clamp but still had to pay even though I showed him the valid ticket. He said to write a letter to their offices about it which I did but they said that they couldn't do anything about it.
Anything I can do here? Seems very harsh when I did have a valid parking ticket.