Cancellation request refusal

When I was at QVC I tried using the points I had but was informed that there is no space available at 2 of the places I enquired about and I tried different weeks as well but they could not provide me with any open dates. I tried to cancel the membership a week after that and they informed me that I can’t. I have tried numerous times to get the membership cancelled and even provided them with my monthly expenditure to which they just rep**** I need to see a debt counsellor. In 2014 a lady phoned me and informed me that they will write off all my outstanding debt if I move over to them, MDC, and made promises etc. I obviously took out the membership from them and started on a clean slate. Just to mention, I stopped paying and reversed the debit orders while I was at QVC and therefore had debt with them. Since 2014 I have received numerous calls to change from the one product etc. and then my contract just start over every 2 years because they phone me every 2 years to inform me that they have something new and the old points system is no longer being used or something. I decline the offers and inform them that I want to cancel my membership but they inform me that I am unable to and then I get a mail informing me that my queries have been sent to their lawyers etc. but I never hear from them and a little later, 3 months or so, I send a mail requesting to cancel my membership, Stating in my mail that I want to cancel my membership and want to know what steps to take then I receive a mail with how can they assist me with my query. Did they not read the initial mail I sent. They have been taking my money for so long and not once have I used their points. They are only here to fill their pockets and do not care if you suffer to get by monthly.