Pathetic Customer Service

I tried multiple times to cancel my account and I finally managed to get it cancelled on the 27th of May already. I received a SMS with a reference number confirming that it is cancelled, with the help of a customer service assistant too. I have been billed up until October and received a SMS a week ago that it will be handed over for collections. According to me it was cancelled because even their employee told me it was, I haven't been using the landline or wifi, however I am expected to pay this when the fault was not on my side. Pathetic.

Telkom is so quick to ensure you open an account, yet such a lengthy process to cancel. If one of their employees told me it is cancelled and a SMS will come through shortly, which it did. Then why is it still open? Why does Telkom not just cancel it?

Pathetic customer service too as the first person I spoke to today, hung up on me.