Bosch service Kempton park

Bosch service Kempton park is not a good place at all. Their service is way too bad. I tooky car there as it was mixing water and oil. They called and said its fixed when I got there the engine light was still on. I took the car back. As time goes,my cuz saw my car being driven around making errands. When I thought my car is at the workshop being fixed. That's not good at all. When I call to ask they say it's taken to engenering but not it's around s**** yards don't k ow what they doing with it. I need help.