Worst Avis-Lanseria

We rented a car at Avis Lanseria and as we were going through the contract, the lady put a note "no fwt noted", to which we raised an objection and were told if we do find any problems we let the person by collection know during inspection. While trying to do due diligence inspecting the car I note some scratches and the guy says "kelifinyela" -the brush they use to wash the car and they are aware of the scratches on the car. Yesterday I returned the car at 5am before they opened as I had a flight at 6am. Later on I get a call that there is a damage crack and scratch on the front bumper, to which I raised an objection and asked for dated pictures as we had no incident with the car. Paul says they have gone through the records of the car and there is no previous damage noted. Really???? What happened to we are aware of all the scratches on the vehicle??? I would like to state on record that we did not cause any damage to the vehicle. It is unfortunate that we missed this doing our inspection before taking the car and were expecting the same service we received from other Avis centres. However lesson learnt and I will never be renting from Lanseria Avis again. Already we were not happy that we didn't have a choice in the make of the vehicle as it was the only Group D car available whereas we have rented from OR Tambo and Cape Town International and the service there is way better with a choice of 5 cars and they are open 24 hours. Now we are told that I have damaged a vehicle when no such thing was caused by us. I am miles away in Cape Town and have no way of inspecting the vehicle and I am not being sent pictures. I would also like to see the records of the car were no damage has ever been recorded.