Telkom - Customer Service - the biggest HOUX EVER!! Computer generated interaction

We have a business account with Telkom. Due to an add on service that Telkom authorised on our business line, the line kept on cutting off after 10 seconds. This caused major problems with our suppliers and customers. In the end the Telkom help line advised us to discontinue the line, in order to get rid of the problem. According to Telkom, there was no other recourse. We did this in August of 2017. The forms were submitted, and the line has been discontinued. Till today we are still receiving an account every single month for this account. The account charges are just running up, as we refuse to pay for a service we no longer have. We have logged calls, we have sent emails, and we have written letters, to no avail. Every month this account is back. Yet we have not been able to speak to anyone in a management position, all replies has been automated, and computer generated. We need to get this account stopped, once and for all. We would like to speak to a person, and we would like a person to come back to us on this. The account number is: ********** 96. Our ref no is: ********** 1. They assured us that we will get feedback within 5-10 days, it has been months. We are absolutely devastated by the poor level of service from Telkom. You would think that in light of this being a problem that they had caused, they would be more forthcoming with assistance in this matter. We have advised them that no payments will be made for all these once off charges that they are billing us with. We will not pay for their mistakes.