Disgusting service and *****s my money

I have cancelled my policy two month ago and they continue to take money off my account. I sent my cancellation letter to a manger named dirk and he said he will sort it out and he did nothing . I went to the back to cancel the debt order and they still took money off my account . I phoned head office and they said my policy have never been cancelled telling me they can’t promise my money back ! WHOS PROBLEM IS THAT. DISGUSTING CUSTOMER SERVICE I WANT MY MONEY. STOP EMPLOYING *********** PEOPLE