Worst experience ever. I ask for tire repair and m...

Worst experience ever. I ask for tire repair and maintenance service for my car. They ask me for over $1,600 for my tire repair. After I remained they that I have a tire insurance, they said the service is not included.
However the tire s nail was covered before when I did service in Anaheim.
When I arrived to pick up my car, I have waited for almost 1 hour. The nail had not be fixed, and no one told me that.
My experience here has greatly reduced my impression of Mercedes-Benz. I will not serve in this store in the future, nor will I consider buying Mercedes-Benz cars.