Ongoing billed charges on closed account

Good day,<br> <br> I had Cell C contract and was cancelled last year however I was advised to wait for the full contract term to expire. The SIM card is no longer used but have been paying the monthly subscription. I then called in November to close is the account. In Jan 2015 I receive notices for debit order and email notifications of the account in arrears. I do not want to receive any reminders of non-used account that I requested to be closed. Please cancel the account and confirm the status of the account as I will not be responsible for any further payments on this contract.<br> <br> Regards<br> Lulama