Bad customer service Jan Grobellar

My car was towed on Monday the 12th of February 2018 to GM edenvale, to date no update was or feedback was given about the status of my car, I walked into the dealership (Opel) which is the service centre, Found a very arrogant rude man by the name of Jan with tattoos, he just looked at me, and continued with his telephone conversation for over 10mins, got off the phone, and carried on to make another call, I then politely asked him, am I going to be assisted anytime soon..he raised his voice and said “Can’t I see his busy with another customer” I rep****, all you have to do was acknowledge me and tell me you’ll be with me just now, you can’t carry on talking on a phone, finish and make another call, he bluntly told me “I have no manners” shouting at me like some school kid, then he calls someone to assist me, as he didn’t want to deal with me anymore..that is so unprofessional and disrespectful. So all along there was someone who could’ve helped me, he chose to ignore me and do his own things. This is a reputable car dealership, it’s very embarrassing to see you can’t treat customers or have a sense of urgency, by far this is the worst service I have ever received in my entire life!!! The “G” in GM Motors, should stand for Gangster, looking at that you hire ********* in suits, if I didn’t keep my cool and kept quite, he could’ve beaten me up...it’s preposterous that you actually allow staff to treat customers like that, it’s that what you stand for? Is that the GM culture? Vision & Values?