Damaged my car.

I took my car for service. I was late for work because the said they didn't have drivers. Secondly when I went to fetch it I found out that they have damaged the boot of my car. They failed to let me know I found out when I was doing the inspection. The car was not properly washed. This is not the first time I'm having issues with them. I complained this morning when I took the car in and I was assured that this time they'll take proper car of my car.