Unauthorised credit card transactions

I received the keys to the rental car at 11 o'clock at night. The car was not parked closed to a direct light, so I did not notice all the scratches and dents. I did mark some and took photos of them. On returning the car, I made a statement that the car was badly damaged and had many scratches on which I have not noticed in the dark - and I was not responsible for any additional marks or dents. Without any further communication R4000 was deducted from my credit card. For a month now I am trying to get Hertz to indicate why the money was deducted - and the only response is - it is at the claims department. This is a **** - the cars are so badly damaged with scratches and dents, that you cannot spot all of it and then they take money from you. This means they are deducting R4000 every time the car is returned. This is unacceptable, ********** and poor customer services.