Very Bad service they debited my account without my permision and dont get back to clients

I hired a vehicle for the 27th May to the 30th May. When I got to the Cape Town international to collect my vehicle I was told that I still need to pay R1914 for hire ring the vehicle. I advise them that I've already made a payment on the 25th May and I have proof of payment. Finally they gave me the vehicle. I returned the vehicle on the 30th May. Few weeks later I contacted the company to query why my holding amount of R2000 has not been released yet and the Consultant by the name of Tohriq advise me that I need to email my rental agreement number as he cant trace my booking with my personal details. I called him back the following day to supply the relevant information he required. He advise me that he cant trace anything from his side can he call me back. I waited a few days for his call until I've decided to call him back. He denied that he spoke to me even after me telling him what his email address is that he gave me. He helped me and said that I need to hold he will speak to the bank. He got back to me saying that the bank has released the funds and it will take +/- 2 days to reflect. I called standard bank on the 20th June and they advise me that Dollar Trifty has debited my account with R1914 on the 25th May that was for hiering the vehicle and then on the 2nd June R358,73 which is fine cause I returned the car without filling it up with petrol. Then on the 4th June they debited my account with R1913,01 and I don't know what this money was for. On the 20th June I contact Doller Trifty again and requested to speak to a manager. I was referred to Greg who advise that he is currently busy with another query and will deal with my query in the next 2 hour. He advise that he will call me back. Up too today the 26th June I'm still waiting for him to call me back. Very Bad service will never refer people to them.