termination department rated zero

I bought Cell C contract for my son about two years ago. When the contract came near end of period, I phoned, emailed numerous times to get the contract cancelled. I do not have a Cell C contract and have to use the 084 number..which is most of the time not working or busy!! I'm extremely dissatisfied with Cell C's service to end this contract and just let me pay month after month. I just phone now and once again when they transferred me to the terminations department they cut me off. I think they are doing it on purpose?! Can some one please assist me to cancel this contract - ********** . NOTE THIS IS NOT MY NUMBER - I HAVE A mtn NUMBER and my son is since last year not using the cell c contract any longer. I wan to be contacted on my landline - ********** .