Disgusting Service

I booked in my car for overheating, the car was eventually fixed after 4 weeks in their workshop. When I collected the car back the signal lights, reverse sensor was no longer working. Returned the car back was told that they had damaged a part during repairs and will have to order.2 weeks down the line they still don't have the parts ready.Midrand offers the worst service and I wonder why head office is not doing something about this