Terrible Experience

I rented a car on the 14th of December 2023 returning on the 16th of December 2023. So, from my trips between the dates I have to call Avis to report the fault on the car that i was driving then agent who assist me informed me that they will change the vehicle am querying and give me another one, so I can carry on with my trip. then after three hours the tour track came with the car to replace the one i was driving. the guy got there, then he took out papers to sign that am replacing the vehicle and give statement on the reason why am changing the vehicle, i then give statement and signed papers then do visual checks for the vehicle am taking and i drove off to Joburg. then next day (16th) morning around 11 i took the vehicle to the drop off at OR Tambo Airport then when i got there, the agent who assisted to receive the vehicle. He check the vehicle all around it then change scanning machine then he said this one network is slow am going to trying the other one then as he moves around the vehicle, he said there is a dent next to your driver door handle. i said i can't see it, then he said you can't see it but scanning machine can sees it. and then he asked me to write a report of what happened. i then wrote a report and signed off. the Monday the 18th around 9am i got a call from Avis representative Polokwane saying that the vehicle that i have exchange is got the dent on driver door handle. then i ask her to send me the picture of damage. which she is not yet send them. then today in the morning i got a call that i must pay R 7392,56 for the damage of the vehicle that i dropped in OR Tambo Airport and i should for Polokwane to bill me on the damage they saw.