Poor Car Service Repair

I am highly disappointed at Bosch Kohler Motors Parklands with their inadequate and unsatisfactory service to repair my car. On the 14th July 2021, I dropped my car at the service workshop for repairs. The workshop is taking far too long to repair my car (rebuilding the engine because of the engine light that was on) It’s been six months now and I don’t understand why it is taking this long, I was told that the work would take up to 3 weeks initially and the parts were in order 3 months after dropping the car. Then there were engineers involved that the workshop sourced and they didn’t do a great job, but I am affected by this. I find what is happening to be unacceptable at all scales.