Worst Service Ever

This is the most pathetic service i have EVER received from a company. Its an absolute joke. I cancelled my contract October/ November 2014. Every month since November 2014 my account was debited for the contracted amount even though I have cancelled my contract, every month I would call the call centre and fight with them, explaining the situation and asking to speak to someone higher and they refuse to put me through to someone higher for assistance, then the person at the call centre will log that the account was debited incorrectly and after 2 - 3 weeks would refund me the amount. Its April and my account is still being debited. This is a joke. I am tired of dealing with *********** people in your call centre and needing to keep calling to get a refund. Please can this be sorted by today or you leave me no choice to open a theft report against Virgin as you are *****ing from my account!