Bad bad service with deposit

I had such bad experience with dollar thrifty.... I booked a car and did not take a waver on it, I paid online and phoned through and was told by the gentleman on the phone that I could get a waver to reduce my deposit and could get it in the store. I opted to do it in the store as I prefer to handle certain things face to face. I had a late evening flight and my reservation was at 23 45. When I got there, I was told that the waver could not be added as the supervisor that can change it was gone. The gentleman working in the front desk could not change it as well. I was then told by the gentleman that I could come in the next day (as there was no CPI to check the car wjth me as well) to change the waver. I paid R6000 for my deposit. When I phoned the next day, the supervisor said there was nothing I could do, as the money was taken already and the bank could not release it... I was not happy with this and made it very clear, as it was NOT MY FAULT, that a supervisor was not in at that time and there is no disclaimer stating that they leave early. He said that he will try and confirm with the bank if they could release the money. FYI, I just had to put on a R300 extra for my deposit to be reduced to R2000! How ridiculous!! The supervisor phoned me again later the day to inform me that he is busy with the bank which I appreciated bjt after that he never called me again... Its been 5 day. I called in today and voiced my greviances explaining that I would go above and beyond to help a client and was quite upset especially since I had to be the one to call back. He was kind enough to listen but told me at one point 'mam please don't use that tone with me'. He assured me that the manager would phone call back tomorrow but I am sick of. This service I will never ever recommend this company again and my boyfriend also hired a car and had a greviance as well. Poor service and even worse customer etiquette. I see all the reviews that people are not getting their deposits back. Imagine holding my 6k!! And to think, If I had to have an accident with a scratch I would be charged IMMEDIATELY whereas they are taking forever to help. Me! Will never use this sorry excuse of a rental company again. No wonder why Thrifty is always empty and Avis is always full!!