Disappointing service at CMH Opel Umhlanga

I have been very understanding by CMH Umhlanga has taken me for a ride and I am really angered. I dont know whether they undermine me because I am a black person or they have other reason for undermining me in such a manner.

I left my car with them on 14 June and they decided that they would only attend to it on the 17th of June - my car was just parked there at their premises and they even moved it from the front to the back of the workshop. I had to call Sugen and ask whats happening, only then that it was moved into the workshop and diagnosed, only to tell me that I need to wait for another 5 days before my car would be fixed. Come the end of that five days, they told me that they had to replace the engine and I had to wait for a further three weeks. Well their service manager ensured me that I would be given a rental car to use in the meantime - it's been a week now I still don't have that rental car. I have to deal with frustration of public transport in a rural area, I have to have my kids skip school occasionally because I drop them off at school. The guys at CMH Umhlanga are just quite, not telling me whats happening - nothing! I am disgusted. I could never recommend this branch to anyone.