Bad service ever at Hyundai Harbour View

Going to Hyundai Harbour View is such a pain, I have not received such a pathetic service in my entire life. I have been there twice to service my car and both experiences are the worst, the first time i was there some lady mistakenly bumped into my car while i was still in the premises they couldn't help telling me they not involve okay i understand all companies have procedures and processes however there would have somehow facilitated the process since I was in the premises and the lady ended up not fixing my car. Furthermore, on the very same day they mistakenly service another car thinking it was mines and I had to wait an hour for my car to be released. The second experience happened this Tuesday 9 October I took my car for the second service and this time they misplaced my service book after that they advised that I need to buy a new one. I have been phoning nonstop leaving messages for the supervisor/manager who was on duty that day to call me back but I have not received a call from them and nobody is willing to assist. On the other hand, after service you normally receive those unnecessary programmed messages thanking you and advising that a follow up call will be made ensuring that the visit was of satisfaction. Not even once I have received a call from them after service. I even hate going there cause every time you there the service just become worse and its like a trend now. Their service is just a nightmare and I so wish the rating system in most companies is still applicable their service would have been -0.