Continuous persistent incorrect charges

Avis is deliberately billing people's credit cards incorrectly. I am utterly annoyed because I hired a car and returned it on time and at correct location where it was delivered. My credit card was debited R929.60 on the 16Feb. I enquired about the amount and spoke to the manager at the Roodepoort branch and she confirmed that about R495 was supposed to be debited on my credit card. She promised that they will refund the R929.60 and debit the correct amount. On the 13 March R951.60 was again debited on my credit card and on the 14 March R929.60 was credited into my credit card. I escalated the matter to the regional manager Justin, he promised to resolve the matter. I was only disgusted to receive a phone call from Lucinda telling me that the matter was resolved. If the matter was resolved what is the R951.60 for and not the R495 that was explained to me? How can avis make a mistake twice. This is a ****. <br> <br> I am going to phone radio stations to make people aware of how avis is operating a **** using peoples credit cards. I am beyond annoyed!!