Still no refund after being overcharged

In November I rented a car from Avis for 4 days using my BA points and was surprised to see that at the end of the 4 days my bill was over R5000 and the majority of the cost was due to excess kilometres. The statement said that I had travelled in excess of 2000 km.<br> <br> When I queried this the support team at Avis was incredibly helpful, specifically a guy by the name of Adam, and he realised the problem was that the car had been to the panel beaters before I picked it up and they had not accounted for that mileage. Adam was very helpful and ensured me that I would get my refund. <br> <br> By the end of January I had still not received it and have been trying to call Avis over and over again. I even registered a complaint via e-mail but have still not received any feedback (e-mail sent 25 January, reference number available if required). Another supervisor Abrie also tried to help me, very nice guy, but I have still not got my money back.<br> <br> All I want is for someone from Avis to contact me directly and tell me when I can expect the refund.