wrong information provided

my car was supposed to be serviced today and I was advised that the polity expired. I need someone to explain to that 3 months ago the car was in for service and I was told that I had to bring in the car for service on 230000.00 KM it is not due yet and today they are telling another story. I need to understand that how are they debiting my account if the policy is no longer in use. I need my car to be serviced with no charge cause I was advised if the policy was going to expire and the information give from the sales department to the claims department is very disappointing because I was mislead as a client . I need someone higher to contact me and explain to me the way forward because the car is still at the dealership