Battling to cancel ADSL account

Despite receiving a read receipt and confirmation of receipt of my cancellation email, Telkom is STILL billing us. I have tried phoning the call centre number, but 50mins into holding, life happened and I had to stop holding for service.<br> <br> This is a common occurrence when phoning this company!<br> <br> Enough notice was given, all relevant documentation was sent. We just want this account cancelled!<br> <br> Telkom are exceptionally unhelpful at all times!