First Car Rental are a bunch of *******

My insurance arranged a car rental through First Car Rental for which I had to put down a refundable R1500-00 deposit if I returned the car clean and filled. When I received my own car back from the panel beaters I phoned First Car Rental to arrange for returning of the rental car. I was told that I could leave the car by the panel beaters where they would pick it up.

On my way to the panel beaters I filled the car (and provided them with proof).

Two days later I got a bill saying that R103-00 has been deducted from the deposit (which I still have not received back) because I am liable for the full amount until the car has been returned to the lot.

How far away is this lot that you had to add an additional R103-00 to a full tank and why was this never disclosed to me or included in my rental contract.

First Car Rental are a bunch of *******!!!