Mercedes Paarl Branch

I took my Mercedes to Mercedes Paarl for a service, and asked them to reprogramme my windows because sometimes the windows does not open or close correctly. While driving home I decided to open my roof window - which in the 3 years I have been driving my car HAS NEVER GIVEN ANY PROBLEM. The roof did not want to open immediately , after it opened at last - I wanted to close it , but it did not want to close. It kept slamming down - making a loud noise - but did not close. The following morning I phoned Tiaan at Mercedes and told him about the problem. I told him before the service , and reprogramming of the windows NOTHING was wrong with my roof, but 15 minutes after I received my car the previous day my roof window was faulty. Tiaan told me that he DOES NOT LIKE MY ATTITUDE AND THAT I AM SUGGESTING THE FAULT IS WITH THEM. Really???? After years of paying them to service my cars....this is the first time I told them that I am not happy....and this is the reaction I get as the CLIENT? My husband spoke to the Manager of Mercedes Paarl, and can you believe this : He told him that he drove the same car as mine, and that the roof of his Mercedes often give the same problem. Really??? And according to him its case closed? So my roof still does not work, and I have to fix it at my own cost now! They will NEVER SEE ME AGAIN! TERRIBLE CLIENT SERVICE😡