Telkom still charging for cancelled line.

I cancelled my Telkom account on the 31st July, reference # ********** 8, got a confirmation a couple days later it had been resolved. I took this to mean that my account was closed on their side. By their stupid business method I figured I would have to pay for August and September because of the 30 day notice period and their billing cycle. I have now just received an account for October, I don't know what they expect me to pay for since the line is dead. I have tried to contact them to settle this dispute but get nowhere. They don't respond to emails or requests on their website. This is utter nonsense!