False Charges of Damage and Delay in Refund

I booked the vehicle reservation through Enterprise Canada. Upon returning the vehicle I was quickly charged for damage that I did not cause. Only after querying the claim it was proven to not have been my responsibility I was informed the amount would be refunded to me - I have been waiting almost 3 weeks for the refund of this amount.

As they have been delaying the refund, the South African currency has been weakening and I have lost over R120 as of 27 March 2014 just on the current exchange rate alone, without any payment having been made. The customer care staff read emails half way through and then reply and do not address my queries. I have requested to speak to a supervisor and have once again received an email that does not address any of my concerns. I have never had issues with Enterprise Car rental before. I believe they should cut their ties with Woodford and make other arrangements.