Cannot Cancel Service

I completed the subscribed cancellation form and send it to the Telkom cancellation department on 21/11/2017. I received confirmation that they receive the document with a promise that the service will be canceled after 21 days. On 02/01/2018 (42 days later) I phoned Telkom's help desk just to find out that the service is still active. I talked to Ayanda Agreeneth Dladla whom promised me if I send the first cancellation form to her, she will make sure the line is cancelled and my account credited. I did that and even received confirmation from her. Now on 14/01/2018 I receive my February bill and the line is still active. Is there absolutely no person within Telkom that has at least one single brain cell that has the capability to press a few little buttons to cancel my service? L Smith Service number : ********** 452 Account Nr. ********** 43430