No-response when trying to cancel

<p>We have sold our house, Have sent the cancelation email with all the completed forms etc but absolutely no repsonse, we are already out of the house and the new owners in. WHO is going to be paying the bill if they use the line?<br /><br />How can the only means of canceling the line be through email, no one to talk to to find out if someone has started the cancelation process.<br /><br />I will refuse to pay the bill 30 days after I have sent the cancelation email.</p>