RCS refuses to refund my money. (R3362.85)

I had a very bad experience with RCS. I erroneously paid R3300-00 into their account on the 7th of June 2019. I immediately contacted them and send them proof of payment and copy of my ID. I wanted to pay R1300-00 and instead of refunding me they are playing delaying tactics and games. I call them every day and each time it is a new excuse. I am now tired of their games. They keep on saying they have escalated my complaint but nothing seems to come out of it.