Bad service

My car was financed under MFC, last year September my car got ****** so the insurance paid out the book value of the car and fortunately I had shortfall insurance as well, the shortfall insurance paid out some of the remaining balance, hence MFC had to subtract the warranty and the service plan which they are failing to do, I've called on numerous occasions sent emails but nothing seems to be done what's even worse they are still taking money from my account I'm not happy with the service