How do you get hold of ADT?

<p>Wow... has anybody tried to get hold of ADT lately? What a mission. It's like talking to a wall</p> <p>I wish to cancel my account, but when I phone ***, I am left on hold forever and never reach anybody</p> <p>When I try to email their only listed email address ********** it bounces back with the message "Invalid recipient"</p> <p>Can somebody please phone me so that I can cancel my account please?</p> <p>Thank you</p>