Unable to stop my debit order due to intentionally ignoring the procedure

Hi. I had to move from Saldanha to Potchefstroom in January of this year due to work. I had instructed Telkom on 11 January 2016 to cancel my account and line with them via email to *** as they informed me to do. I received an email stating that a Telkom representative would contact me but no one did so. The debit orders continued to go through. I had phoned Telkom customer care and they informed me once again to send an email with the necessary documentation to cancel my account. I did so again on 07 April 2016. Still no one from Telkom has contacted me and the debit orders are still going through. I believe Telkom is deliberately making it extremely difficult to cancel your account in order for them to ***** your money. Once again i have to phone and send emails at an extra expence to me because they just take my money. I am extremely upset with the level of service and pure incompetence from Telkom.