Two weeks later and no refund of overpayment

First of all when I got to their office at Cape Town airport they claimed that I had no booking which I had previously made through Kulula. I had pay about R4500 for a Polo for 5 days. When I got back to Jo'burg I received an email telling me that I would receive a refund which to this day two weeks later I have not yet received. You simply cannot get though to the admin office in order to sort out this mess. NO MORE EUROPECAR FOR ME EVER AGAIN.