Being billed for a system that's not working

I cancelled my monthly contract ADT as my system hasn't been working since March. I cancelled in July and was contacted by their customer service consultants asking if they can assist me so that I don't cancel. I said ok, they promised to send a technician which never happened. ADT continued to deduct money from my account even after that, they claim that the fact that I said the customer service consultant can send the technician meant I wasn't cancelling. <br> What the consultant said, was \ can she assist just to see if I can't change my mind and not cancel"nowhere in our communication did I confirm that I am no longer cancelling. <br> <br> YOUR SERVICE SUCKS AND I HOPE YOU GET SOME JOY FROM MY MONEY!!!"""