Fighting for my Loan Refund

After my loan being settled. FNBs loan department still took off money on the 28th of September when I called in they told me it would take 3 -5 Working days to refund. That was last week. I called again on Friday the 6th October as I had still not received my money and they told me it had only been sent for process on the Thursday the 5th October. As you can guess I am sick and tired of phoning for money that is owed to me. It is almost 2 weeks since the money was taken from my account and has not been returned. I don't know what it is going to take to get my money back. They are quick to take your money but when they have to give it back you have to jump through hoops. I expect this money to back in my account ASAP or I will be changing banks.