POOR SERVICE BY AVIS CAR RENTAL EL

I got a courtesy car through AVIS on the 4th of July 2019, I asked to pick it up to be at the airport because I stay lit close to it but was advised I have to go to Vincent. when getting to Vincent, I was told the car is at the airport. went to the airport again and when getting the car, the fuel gauge was not on full, I asked and the car was taken to be checked but it came back the same saying fuel gauge is not working properly. its a new car. I took pictures of the fuel gauge. I returned the car on full tank on the 30th of July after 1700 or so. waited for it to be inspected as I normally do whenever I hire a car, a guy came and inspected the car and said I can go all is well. 2 days after I got a call that the car I had returned had Major damages on it. I asked how is that possible when the car was inspected in front of me NO ANSWER was given instead they said I should write a statement and fill a form where I sent my statement which is the same as this review. NO FEEDBACK WAS RECEIVED!!! instead, I had an R223.48 transaction on the 5th Aug and the following day another of R3209.88 without any explanation. I called the HO to log a dispute last week and this morning I got another Transaction for R4859.88. AND STILL NO EXPLANATION!! AM VERY ****ED OFF AT HOW THIS HAS BEEN HANDLED, NO REGARD FOR ME AS A CLIENT AND COURTESY TO UPDATE ME. HOW THE FLIP DOES A CAR THAT HAD NO DAMAGE WHEN it INSPECTED GET IT 2 DAYS AFTER!! HOW?