Cancelled our line rental 24th June already

I called the Telkom call centre on the 24th June to cancel our line rental, they told me I need to send an email to the Cancellation Division at [Email Removed] which I sent them the required documentation, and I received an email confirmation from Telkom stating that they received my email. <br> <br> When my July rental Invoice came I noticed we were being billed up to 20 August 2015. So I phoned the call centre again to ask them, why are we still being billed after the 24 July, and the lady told me she doesn't see anything on her side that this line rental was cancelled.<br> <br> After trying on numerous times Today to get hold of the call centre, the line just goes dead, complete silence on the other side. <br> <br> How am I ever supposed to cancel this damn Telkom line if their employees don't even do their jobs.<br>