ADT bad service

So my alarm has been faulty, every time there is a new issue. Technicians were sent out to `fix` it, but nothing has improved, the issue still persists. On 5 October 2018 i requested ADT to cancel and remove the alarm, until this day i am still waiting for them to do so, so now i have to pay the monthly fee for the faulty alarm which is so frustrating. I keep phoning and advise the consultants, all they ever say is, the technicians will contact me to arrange but nothing. I am furious because they are greedy and deliberately waited a whole month so they can receive payments. PLEASE come and remove your alarm ASAP!