Capitec Bank is inefficient 9

I had an international transaction with them. They couldn't help with it and I decided they reverse the amount of money back to the sender. They advised it would take 7 business days , I'm now at day 20 and nothing has been done , I have asked them for a proof of payment and they haven't sent anything my way. The staff is rude at the forex department and they even hang up on you. If anyone knows how I can get the bank to do what is right please let me know. I don't mind taking them to court