Keeps on billing after account cancellation

Altech Autopage keeps on billing me after I have sent notice of my account cancellation. Please help me.<br> Dear Autopage,<br> <br> I sent my cellular phone contracts (x2) cancellation notification on the 02-12-2014 already. I was notified that my contracts expire on the 15 February 2015. Please ensure my contracts are cancelled on the 15 February 2015 as per your email below.<br> <br> <br> From: Rudolf De Villiers <br> Sent: 26 January 2015 10:25 AM<br> To: [Email Removed]<br> Subject: FW: Altech Autopage Cellular: Service Desk Notification<br> Importance: High<br> <br> Dear Autopage,<br> <br> I sent my cellular phone contracts (x2) cancellation notification on the 02-12-2014 already. I was notified that my contracts expire on the 15 February 2015. Please ensure my contracts are cancelled on the 15 February 2015 as per your email below.<br> <br> Kind regards<br> <br> <br> From: [Email Removed] [Email Removed] <br> Sent: 04 December 2014 04:48 PM<br> To: Rudolf