Month to month contract without my consent

My contract ended last year November (2017), as per the instruction from the call center agent I sent the cancellation form in October to notify Telkom that I will not continue with the contract. I did not receive any feedback from them, I kept calling and calling I was transferred to different departments until I stopped calling early December. I started calling again towards end of December and the agent I spoke with gave me his e-mail address of which I re-sent again, the agent confirmed on my email that he gave the form to his team leader. Even today I am still on a month to month contract, last week again I wrote them another warm email on their website requesting them to end my contract but still no reply from them. This is my last resort to beg Telkom to please terminate the month to month contract I've never requested.

Thank you in advance for finally attending to my query...

Client