Lying,cheating service

I needed to hire a car and i chose Avis Ormonde and what a regretful experience it was.A month ago i went to Avis Ormonde to hire a car and was told to pay R5200 for a deposit. Upon returning the car after a week another 5600 was taking from my account from Avis.in the process of it all the consultant told me time after time i wll only need to pay a 400 outstanding hence the bill came to 5600.i then logged a complaint to head office of avis and im waiting 1 month now for feedback.however R7100 went off my account from Avis **********ly. But luckily I had cancel the card prior so the transaction did not go through. I forward proof to Avis and no feedback yet again.i waited nearly a month to even receive my own deposit back from Avis..the kept saying the problem was with my bank fnb.i then decided to call my bank and explained the situation. My bank said Noooo..Avis is lying about giving your deposit back hence my bank does not have authority to release my deposit back to me,it was the merchant of avis(Nedbank)that should've released it.my bank made them release it same day. Avis were only gonna lie time after time.poor bad ******* service.