Deposit refund still not paid

I have been waiting for more than 3 weeks to get the deposit for the hire car paid back to me. On monday 14 March I contacted Khetiwe regarding the refund. She checked with her accounts dept and according to them the refund was done into my credit card. On Thursday 17th march i contacted her again as payment still hadn't been made. She sent me proof of payment but the payment was only done on Thursday. It is now Saturday the 19th and the funds have still not come through to my credit card. I desperately need these funds. First Car Rental must have done something wrong AGAIN with the payment as it is impossible for a credit card refund that was done on speed point machine to take more than 2 days to clear. I am very unhappy about the service i have received. I have never received a call from First to update me on the progress of my request. I am the one who has to constantly follow up. Get your act together First and get my money to me!!!!