De*****ed by Avis Car rental

I was de*****ed of my money by Avis car rental in Centurion. I had rented a vehicle while I got mine fixed. When I brought back the rented vehicle an assessment was done and the car was okayed. While I waited for the person who was to pick me up, the guy who had taken the car to park it came back to me and told me there was a scratch in the right front bumper. I had to go with him and he pointed me to a small scratch at the bottom of the front bumper. While I had no record of this happening, because of the hidden nature of the scratch I gave him the benefit of doubt and I signed the electronic charge sheet and requested to know the cost but then I was informed this will be sent to me after the repairs. To my surprise the amount deducted from my account was not proportionate to the size and nature of the scratch. Upon making several follow-ups through the customer services emailing and calling, on the 8th of August I received an email from customer services saying that their investigations they were informed by the branch that the money deducted was in line with the costs listed on the charge sheet which I had signed. To my shock the charge sheet that had one item when I signed it now it had 3, two of which were never communicated to me and worse still they were added after my signature without my knowledge. The following day I went to the branch and met the manager who confirmed that the additional two charges were not supposed to have been deducted from me and that it was an error that these were added on an already signed document without my knowledge. He then told me he was sending an email to process the refund, I then requested to be copied of which he agreed and entered my correct email on the cc section. I was told that the refund would be processed by Monday or Tuesday. However, after 3 hours without seeing the said email I called the customer service and and I was transferred to the manager and I asked why his email never came he claimed to have sent it and was going to forward me the confirmation from whoever was to process the refund. I then gave him again my personal email and added the business one again up to now that email did not come through- the refund has not been processed, it looks like the apology was insincere. I called the customer service again and I was transferred to the branch and no one picked after about 10minutes I gave up. It will seem to me Avis is aware of these ******** activities and somehow it is not so sincere in addressing them.