Failure to return deposit after 3 weeks

I arrived home from a holiday in South Africa 3 weeks ago and have still not received my deposit. When I left, there was a dispute as the man who checked in my car said there was a scratch on the left bumper. On the form that I signed when I received the car, I was shown the exact scratch and the man wrote on the piece of paper 'rear bumper'. I was not aware that it needed to state left or right as I have never needed to hire a car before. When I told this to the man inspecting the car, he told me I was not telling the truth. I then sat on the floor and cleaned the back bumper and asked him to show me the scratch which he claimed was there, which he could not. Which means that the scratch on the left was in fact the rear bumper scratch that was mentioned on the form. I didn't have time to argue with him as I would miss my flight, due to traffic on the day. I am now awaiting my R2000 deposit. Surely it doesn't take 3 weeks?