Worst Service ever in 15 years

Worst service in the last 2 years. To my bitter regret, I bought my 3rd Mercedes Benz (A200) 2 years ago. Sorry I didn't even go to read because there are more problems on the car than any load-shedding. The thing has been sent in probably 8 times for the same problem. My first service person on my previous room was Hennie, what a shame they got rid of the best. Well then there is a Riaan mazar now, the more I tell him PLEASE go to THE DINGS' PREVIOUS services and see what the problem is. No need to ask. Okay now there is a third person Mark. Again please check the previous problems. Ok the car is back about a month for the same fault. A day later the same problem. A lady from MB calls and asks how the service was. The poor lady couldn't take it all in but promised a service manager would contact me. Wondering if I should wait until the car plan expires. I tell her I do NOT want another call, the service manager can make an appointment and come and hear the sound himself. No call to date. Last week I called Ruben to book a regular service for the 1st of August this morning I get a message and email to confirm my service FOR TODAY the 29th. MB can't even get a date right. The quality and staff at MB Menlyn is one of the worst ever. I'm sure they can ask any staff at retail and a better service will be provided