SAC Boksburg useless unqualified ******

Worst mechanics on Planet Earth!!! SAC’s probably use 6 week wonder motor mechanics who tune 50cc mopeds on weekends . My sister in laws vehicle went for a 90k service and SAC’s Boksburg did a service and replaced the cambelt - R 11k later and the car went into limp mode. The vehicle went back and was there for 4 days - and the problem is not sorted . It sounds like a diesel - the car doesnt go past 2000 rpm -