I do sympathise with you as had similar claim from Europcar. I documented what I did and it may be of assistance to you when dispuring the claim. The relevant thread is here…
If you have dated photos before and after the hire then this should be enough to dispute the claim. The only possible other area which may not be covered by photos is the inappropriate parking of the vehicle which may result in a traffic hazard…for example, a vehicle parked say a metre or more way from the kerb making it stick out into traffic which could ben seen as the responsiblity of the driver that parked the car
Good luck with the duspute and keep us posted.
