Arrogant and ******** service

Took car in for normal service. Also indicated they must fix the noise that the fan make. Later in the day I got a quote for over R20 000 sighting a lot of ISSUES they need to repair. I told them not tho bother and to only do the normal service and to replace rear brakes in addition, I went to them at about 4:30 to pivk up the car because nobody contacted me again, only to find that the paper work was not ready and that they did not even looked at the fan issue. I asked to speak to workshop management and the guy was absolute arrogant towards me the customer. Later the service representative informed me that when I checked my car in the morning I was "helped by a trainee" and the person did not write my issues down. SCARY! The workshop manager just informed me to bring the car again.... utter arrogance. My portion of the service was R5000, very hefty indeed especially with this trainee service and arrogant workshop manager. Never again McCarthy Mercedes Centurion. Stay away.