Maliciously billed!

I purchased a car earlier this year and financed the car through MFC as I have a good history with them. After I purchased the car, I received numerous calls to activate a debt protection cover product, I received this call in excess of 10 times!! And declined this offer every-time. I now see that I am being debited for this!! Obviously someone has benefited from this ''******'' sale and needs to be fired!! This needs to be cancelled and this amount needs to be refunded to me (back-dated) - nowhere have i agreed to this, verbal or written. Please pull your calls and investigate this - I have asked for legal advise as well and will taking this matter to this highest authority!!