Avis Grand central Midrand

so disappointed at Avis grand central in midrand, after returning the rental car, had to wait and still waiting for my refund, I'm given the run around about @Capitec bank holding my deposit and releasing it, the Avis staff is not doing anything for my deposit to be refunded to me. its been 7days where else i was told it only take 72 hours, their excuse is Capitec bank is difficult but if they cant help push my deposit to be refunded who will!!!!!!! best service received