Residential telephone line cancellation

Good day,<br> <br> I'm still billed for my residential telephone ***) line which i cancelled in June 2015, I want to know why this is happening? I did not receive any cancellation confirmation from your *********** support service with the most unresponsive telephone system. You have not refunded my R700 deposit but you have the decency to carry on billing me for a service which i cancelled already. Please can someone attend to this matter ASAP.