Telkom Dispute

I have an issue with Telkom. I have cancelled my landline on the 03/03/2018. I emailed the cancellation forms to 4 different consultants but to date my line hasnt been cancelled. In the interim i am being charged every month since March for something that should have been cancelled. Due to the inefficiency of the consultants that do not know how to do their jobs i have now been blacklisted on ITC. I am not allowed to speak to someone in authority. All im being told is that the matter has been escalated to the supervisor. I would like you to now intervene and get answers for me on how to resolve this issue. I want my line cancelled from the date the forms was emailed. And i want all credits passed and a final account emailed to me as a matter of urgency.