Bad service

Worst service, I got a courtesy car from them for a two weeks. When i returned the car it had a small chip on the windscreen. The guy next to them when they were at menlyn asked if we wanted to fix the chip and i said i am returning the car. The lady who works there came and insisted its a crack and not a chip. We argued about it and said i need to fill a form that will allow them to rather take the money from my deposit to fix the chip. On thursday i got a call from the same lady stating they are trying to deduct money from my account an amount of R900.00. To my surprise now they have sent an invoice to an amount of R2300.00.