Avis Rosebank will ***** you anyway they can

Avis Rent a car, is trying to ***** me out of R2K! I took my rental car back on the 31st March 2019, which was inspected when I returned it in front of me and a colleague of mine. The lady inspecting it mentioned a couple of times that she cant believe I returned the car with no damage. Now suddenly 15 days later they are try to deduct money from my account for damages to the bumper that they say will cost R2k to repair. What bull****. The car was inspected and signed off as no damages. Now they refuse to return my deposit of R1300 and trying to deduct money from me. If this car had R2k damages to it, surely they would have said something immediately and not signed the car back into the fleet. I am so PO'D with you Avis Rosebank. I will go the necessary routes to get my money returned