waiting more than 2 weeks for refund

I rented cars from the Hatfield Branch of Europecar for 41 days. Two contracts! They without any hassle or problems could debit my Credit Card. But seems when they have to return the balance the company runs into cash flow problems. I called and spoken to the branch manager and regional manager with the same result. All I get is that the problem has been escalated and that they will come back to me. 2 weeks and counting! And the saddest part is that I spent almost ZAR 12000 with them and they are battling to return ZAR 2000. They blame keeps being passed to their Bank FNB, I did not rent from FNB neither was it stated in my contact that Europecar will not be responsible for any financial issues that may arise. What would be the action from Europecar if I extended my rental and did not have the funds available? Legal action, theft reports etc! Sorry this is very pathetic! I was charged ZAR 1300 PLUS for the car to be collected a 160km round-trip. Charged for the whole days rent and fuel spent to drive it to its location. This was also promised to be clarified with me to understand the exorbitant charge! Yes still waiting for that phone call as well.