Cancellation of Service - Still being billed!

Since last yeat Sep my line at Pinetown gave continous problems and never worked. I made numerous complaints finally in Mar 2017 Iwas assisted however line did not remain on for long was left with a no dial tone again. I was being billed continously for a line could never use! Now that Ive moved out of Durban and need to cancel my line its even worst! I sent documents in Mid Aug to cancel my service to date its not been cancelled. I am still being billed!!! Extremely dissapointed with TELKOM!!! Acc# ********** 89257