kulula's car rental does not return deposit

I went on a kulula holiday package - reference number 263442/KULW. The hotel and the flights were great. However, I rented the car according to the package from the 16th of December to the 19th of December 2014. I paid the security deposit and was told that if the car was return without any damage and in the same condition, this money would be returned to me. The money was paid by credit card and the transaction went through. I returned the car in the same condition that I received it, having filled up the petrol tank before returning the vehicle. The person receiving the car said the car was returned in the same condition that I originally received it in. The deposit was never returned. I have e-mailed Trish Pakkiri at Khulula, twice but have had no response. [Email Removed] I spoke to K****tso Langa at Europcar Call Centre and he promised to further my complaint to the right person, but still no response has been forthcoming. This means I will have to wait for my leave in July and then go down to Durban and start claiming procedures against Kulula and Europcar and of course my expenses will be for their cost. This is actually theft and ***** to take deposit money