Mumbo repairs Randburg

I had a terrible experience with Mumbo Repairs Randburg, I trusted the guy marketing on socials, but the service rendered was awful. I took my Golf GTI for service and the technicians seems to have poor workmanship, they seemed unsure, they over quote and charge massive amounts for minor things. I returned more than three time with the same problem. They cracked my wind shield, and didn't replace oil after servicing my car, almost hit the top, and they did not take full responsibility, My car is now worse than before, I will never recommend them at all, complete waste of time and money!!!