My account has not been cancelled

I called ADT to cancel my account on 28 March. I spoke to a call center consultant. I was NOT forwarded any details regarding a cancellation letter email.<br> A week later I tried again to cancel my account, in writing this time. I sent an email to the only ADT email address available to me. Again, no response.<br> <br> ADT continues to disregard my cancellation requests on the grounds that I have not followed their (internal) policies, which, as previously stated, they have not even made available to me! This is ridiculous.