TELKOM UNRESPONSIVE FOR 7 MONTHS

I cancelled all my Telkom services at the Telkom branch at Matlosana Mall on 10 October 2017. When I had absolutely no response from Telkom I went back to the branch offices at Matlosana Mall and Escalated the cancellation. Up to now I have not heard a single word from them in regard to this matter. All I do get are ever increasing accounts. I have emailed Telkom about 30 times to date, supplying all the documentation each time but it doesn't make the slightest difference. They simply do not reply. I even communicated with them on "chat" and they told me that the only way to query anything regarding cancellations is via email! So what do I now do?