Bad service

I received terrible service from them. I have never seen anything like this at this dealership in my entire Mercedes life. I took my car to this dealership for service, waited for a call to pick it up, but no one called until the next day, when I was told the garage door had fallen,one of the employees said it was a lie the door had no problem,second day l waited until,I drove myself there to pick up my car. Now, I had to locate the driver who would take the other car home they didn’t care. I was told that the adblue refill was not covered by the maintenance, however when I picked up the car half adblue had been added, so I was unsure if my car was used or not.the whole time it not given to me.