Unable to cancel account

I had a 8.ta/Telkom account opened in 2011. For over 2 years, I paid dilligently and used the services. When it came to cancel, it became impossible. I went into a store, sent emails and faxed through documents. When my account seized to work, I assumed my contract had been cancelled (i.e. after contract expiration and cencellation being sent through).<br> <br> Today nearly 2 years later, I get a request to make a payment from a debt collector. <br> <br> I do not owe you any money and I have also not used or been provided services since my cancellation!!!<br> <br> This must be rectified immediately. Does TelkomMobile also need a billboard put up to get action done?