Cancelling Account

On the 8th Sept, I emailed a cancellation request form for my landline that I have. I have followed up on the 22nd of Sept and on the 12th of October. I have heard absolutely nothing from Telkom, except the automated email service. I have asked them on the Facebook page they have as well, still no luck. I read horror stories about people who want's to cancel, end up being blacklisted as they don't continue paying for a service they cancelled 3, 6, 12 months ago. If I don't want the service any more, why would I continue paying. Looks like this is a concept Telkom does not understand. Please assist me and every single person to cancel our accounts. We comply with giving 21 working days' notice. Why don't you comply in cancelling the accounts?