QVC is refusing to cancel my membership

QVC is refusing to cancel my membership after many years of me requesting to cancel via email. They are purposely unhelpful and very rude when they reply to my emails. My husband asked on email to be transferred to a manager to get better help and the lady who rep**** back to his email said that she is the highest person that the complaint goes to so there is no one else who can help. They keep saying that we have to pay our account in full in order to cancel and we keep paying and they keep taking our money still every month. Is there no one else who can help us?? We are so worried that if we don't pay at the end of the month or reverse the payments that they will blacklist us. For anyone else who wants to join QVC, take it from me and my husband, DO NOT DO IT!!