Telkom Mobile

I have tried cancelling my Fathers telkom mobile account since 2013. everytime i phoned them, i got told to send a cancellation letter, and everytime i phoned that email address to whom the cancellation letter should be mailed to, changed!!! My father passed away in Feb 2015, i contacted telkom mobile once again, i spoke to a lady named Sihle, who emailed me this notorious Cancellation letter, told me to fill it in and send back to her with the relevant documents. I sent through everything asap, thinking my battle has now come to an end. Lo and behold they are still trying to take money off the account and have handed the case over to a debt collector, whom i have just told over the phone, if they can get hold of my father and get the money then good luck to them. Everytime i phone there is a different story, now i phone and they tell me they cant help me over the phone, i must go do a change of ownership on the contract at a Telkom store... I DONT WANT THE CONTRACT. Whats the point of a cancellation letter if you dont want to cancel the contract!!