De*****ed of money

It is now clear to me that fnb and dollar thrifty car rental are de*****ing customers of their car deposits money. It's a month now since waiting for the refund of the two cars I hired last month th in April on the 18 and 27 of April the car rental claims that they have reversed back the doposit money they withheld to my bank account whereas I have not received that money. FNB card authorization confirms that the car rental have released the money and that I will not get notification nor will I see it in my bank statement it will only reflect in my available balance but up until today I have been monitoring my balance the money has been paid back but FNB claims that there is a note on the system that the money was paid back. I am tired of fighting for this matter with FNB and the Dollar Thrifty car rental In a month time I will settle all debt I owe to my FNB linked to my account and close off the account because I am scared that in the future I wight lose more money to ********** with work in the bank in conjunction with those at the car rental because that's my perception of this matter.