Service delivery at the Service department is very poor.

I phoned Mercedes Benz to enquire about getting an extension of motorplan and to make a service booking. They told me to leave my details they will call - they never did. A few days later I went in store to do this myself - a lady assisted me with my service booking and said they will then call me regarding the motor plan - they never did. A week later I am reminded of my service booking of which I am still in agreement with. I go to Mercedes the following morning - I am informed I cannot leave my car for a service as it is not due for a service? This is only picked up now when I am in store? They try to pass the buck by saying that I never gave my km's - you cannot make a service booking without giving this information to their consultant?? The manager was very non chalant & to be honest I am disappointed in the service delivery. Mercedes Benz Sandton has dropped the ball.