Thrifty car rental

Poor service!!!! I rented the car in December 2018 and returned it on the 31st. I was told I will get back my deposit in 7 - 14 days. When I called in on the 15th day, I spoke to Fatima, it is only then that I was informed that the bank I am using will only release the funds back to me after receiving the letter that she will email to me which she promised to do the same day. It day 24 today am still waiting for the letter and the deposit when I call now their phone rings but no response... I regret changing from the company am used to.