Unfair ********* Damage Charge

I hired a car from the OR Tambo branch. The car was given to me with a 'pre-inspected' damage report and I was told all was in order and no one checked the car with me. When I returned the car, because the disk had expired, I was then told that there was a dent and a scratch. I made it quite clear that the dent and scratch did not occur while I had the car, there must have been there when I picked up the vehicle but were not included in the 'pre-inspection'. Furthermore, had someone cared to check the car when I picked it up, we would not have this issue. There is no evidence of the damages being caused by me but they insist that I pay for them, in fact they have already charged me. I would not deny it if I had caused the scratch and the damage, I would have reported it when I returned the vehicle. I was suprised when I was told of these and I simple completed the damage form because I was requestign an investigation. First Car is now telling me that because I signed the contract and the damage report I am liable to pay R2000 for the damages. This is ********* and infuriating. If First Car does not investigate and refund me, I will take this matter further either with the Ombudsman or my lawyer and I will ensure to post it on Social Media because the public needs to know that First Car will do anything to ****** money out of their customers.