I get NO response from Telkom

My contract expired in June and I visited a few few braches bur queues were too long. I phoned in to customer care and Charlene mailed me the cancellation forms which I completed and mailed back on the 25th of September. I have had no answer and have sent 3 follow up emails all which have been read, but not answered. On Sunday the 4th October I went into the store at Tygervalley and was told they could not help me I must phone 10210. I called and held on for AN HOUR and 5 MINUTES only to be told I must call180. After calling 080 180 I held on for 22 minutes only to be told that they cant help other than to email Charlene to see if she has forwarded it to cancellations. The system shows that it has not been done. I dont know what to do next, such poor service!