Telkom refuses to cancel my landline service

I have been trying to cancel my landline rental for almost a year. First I was told there was still an active dsl service on it and therefore it couldn't be cancelled. This was a lie. Now Telkom won't cancel because of 'outstanding amount' on my account. I have paid up to my original cancellation request date. I have email proof of my request and your response. Why should I pay more? I have complained on here before, but never get contacted after this generic response. "Hello werwort

This response serves as confirmation that your query has been received. Your reference number : AI ********** Your query has been sent to our fulfillment team for assistance.

Regards Noleen Telkom Social Media Team. "

Please escalate this to someone competent as I am tired of running after you. My number is in north america and you will have to use +1 when calling me.