Cannot Cancel Telkom Account

I had cancelled my account with Telkom due to poor service delivery in February using the dedicated e-mail address they had set up for this purpose. I even received a confirmation of cancellation and reference number back from Telkom. Despite same I continued getting billed every month. I then contacted their complaints department and sent an e-mail to the call centre adviser enclosing my cancellation, proof of e-mailing and proof of acceptance. Shortly thereafter I received an e-mail and sms confirming cancellation. This morning I got another bill from Telkom...