What more can I do to get them to listen?

<p>On June 7th I went into a Telkom store, filled out a cancellation form for my landline number ( ********** 797) and handed it in. I photographed it so I had proof. I was told I'd be contacted within 21 days. I heard nothing. </p> <p>Since then I've lodged two queries through their website, phoned twice, complained on their FB page, and nothing has been done. But each month my account goes up another R300. I am really really ****ed off with them. </p>