Bad Bad bad Service.... **************!!

First time Mercedes Benz driver-not a brand new car. I phoned the service department to check(with VIN no) if my car should go in soon for a service, they confirmed a service date. Got there and after 30min in a que I eventually went inside to see if there is some kind of assistance and found there was no job card ready!! After 20min or so, and after they helped the lady with her Brand New Merc who came in after me, they actualy took the time to check were the job card was only to confirm that my car is due for a service in +/-2months time. Frustrated I explained that I did phone in advance to confirm if the service was due and they said that its not their fault since they made use of a tempt the day the booking was made????. After an hour or so I drove of and decided to phone the Service Dept Manager to complain about the way his staff handled the situation. He then said that he would look into the matter and phone me back... 3months later no phone call because remember, I only drive a 2015 model car. When the time came for the actual service, again I phone for an appointment and the date was confirmed...only to arrive and again NO JOB CARD!!!! Went inside to the consulting room, they handled me like something the cat dragged in. 5-6 people working there but no one eager to help since they are too busy chatting about their weekend!!!!! The button of my sunroof broke and I took it in so that they can claim and fix while still under warranty... 3 weeks and I had to phone several times to find out about the progress of the claim, and everytime they promised to phone back...GUESS WHAT, no phone call an ZERO progress. Pathetic!!! NEVER will I drive a Merc again because they handle their clients according to your status and year model car they drive-************** Never received such bad service and attitude!!! Will drive my BMW soon again!!! Useless!!!