Telkom Mobile Account Cancellation Dept is Useless

I am moving to an area where my Telkom Mobile data modem has no coverage. I called the call centre to cancel on 21 April. They informed me to send documentation through to their cancellations dept, which I did on the same day. I received an automated email on the same day saying they have received my email and that someone will call me to provide a reference number.<br> <br> It's 4 weeks later (13 May), and no one has called me. I called their call centre again, and they have no record of my email. They gave me a reference number and said it will take 21 WORKING DAYS to get back to me!