Telkom subscription cancellation process does not wor****

I have been attempting to cancel from December 2017 through the Telkom customer account website, calling 10210, 081180. I have messaged twitter and the chat feature. The Telkom subscription was due to end April/May 2018. I paid the subscription till the point this happened. Telkom continued to invoice me subsequently. I have put a stop order and closed the bank account. I am no longer resident. I am no longer using the service. I asked my father to visit their branch in Gateway to intervene. He spoke to the manager at the branches and I was provided with the email of Tshepo Mochwari and StewartV (unknown surname) I mailed both gentlemen and received a response from Tshepo saying that he would escalate this. I have had no further correspondence. I keep getting statements and invoices that are escalating but no services being rendered. I am very frustrated with the cancellation process.