ADT's service cancellation procedure SUCKS big time

We have been clients with ADT for about twelve years. We are now moving home to a different province and thus I had to cancel my ADT service. I do not owe them any equipment or money. The system was paid for in cash. So according to me, we are on a strict month to month contract at the moment. I contacted ADT to cancel my service and the lady on the phone informed me that I will have to send an email to ********** and they will acknowledge receipt of the cancellation within 24 hours. Needless to say, that nobody contacted me to acknowledge receipt of my cancellation after sending the email. I once again sent an email with proof that someone at ADT read the email (read receipt) and I also sent them proof from my server that their server acknowledged the email message as received. ADT, please stop abusing your power as a “large company” and honor your client's requests. Cancel services when and if they are presented to you. You might find that in the future someone will again make use of your service. Not in my case though, you’ve burnt that bridge completely.