Europcar not refunding my money

I rented a car from Europcar at CT international airport on 28 June. I returned it, and the attendant showed me damages on the car, which were not damages I caused. I filled in the necessary forms, and the attendant promised me everything will be OK. Nonetheless, 2 days later, after hours I received an SMS stating that there is a claim against me from europcar, and even before I can respond or anything the next morning they took money from my credit card for the damages. I sorted the matter out and they confirmed in writing (Paula) that they will refund me my money as the previous reports showed that the car was already damaged before I rented it. Now, three weeks later (they owe me approx R3500) the money is still not refunded to me. They are very quick to take the money but takes for ever to refund. I phoned again and apparently they had a \mistake"somewhere and will refund the money ASAP.. It is now anothe three days"