Cancelling a product

<p> I have cancelled a product in November 2016 (one calendar month notice) and in writing as requested by telkom to email addresses: ********** and ********** I have also gone to the local telkom store twice to escalate this matter, I am still getting billed and are accruing late payment penalties. I WILLL NOT PAY THIS ACCOUNT as I have followed all the channels to cancel. Every time I go to the store, that assure me that the matter is escalated and that cost accrued from 30 November 2016 will be reversed, yet every month I get a statement that is just growing and growing in costs. I need a reversal and closure of this account with immediate effect.</p>