Extremely poor customer service yet again.

Upon wanting to open a new cell phone contract with Telkom, I was told that there is a small amount outstanding on my previous number which was converted to a month to month option. Only after settling this amount would I be able to open my new contract. Thereafter I immediately settled the outstanding about and opened my new contract. I also sent the through a request to telkom to cancel the pre-existing month to month number which was being billed at R99 in prior months. All documents were signed and submitted. I sent follow up emails on a bit weekly basis. I called the customer service ever few weeks to get feedback. However, every consultant made me resend the original documents. So I did. And I did follow up again and again. Every month since then (which was early this year) I have being charged R99 for the old contract which they did not cancel. There is no one in telkom that has assisted. I have even taken this to social media. I am utterly disappointed with the level of customer service. Besides being financially affected, it has caused unwanted stress and trouble. Telkom really needs to improve on everything!