Extended Service Plan Horror

I am sad with the service I received from you. I had extended service plan from 105 000Km to 120 000Km which lapsed the had to extend it from 135 000 to 180 000Km. My vehicle is due for service and was told I will have to pay since my policy is on hold due to shortfall payment. I arranged for payment and a month later still unresolved. When ever I call the call center I keep being told they checking what is wrong on the system then automatically hungs up. I have not taken the vehicle for the 135 000 service yet they keep deducting the amount due and also the one for the previous(105 - 120) runs on a monthly basis