Impossible to cancel a Telkom service

Only give Telkom 1 star because the option of no stars are not available. Wasted so much of my time that I should use to provide for my family, and still to no avail. Even though I cancelled this service last year, I keep on receiving this bill. Got confirmation from Telkom that the account is settled - made a screen print of the online chat. Why screenprint?: because Telkom has denied conversations I've had with them telephonically just too many times. My request to get a copy of their "recorded for quality purposes" call has been ignored. I could give them the date and exact time I had the 40 minute call with them. They claim I had to cancel in writing. Nobody advised me accordingly and the cancellation was done over the phone. According to the consumer protection act I dont have to cancel in writing as a matter of fact. I Paid just to get rid of them, even though I did not owe them this money. I then cancelled in writing, but I am still receiving the bill. I've e-mailed the CEO of Telkom, without any response. Right down from your call centre personnel up to the CEO Telkom is pathetic. I can not waste any more of my time - and we are talking hours and hours - not exaggerating !!!! Not even to talk about the frustration....