unable to cancel contract

good day <br> <br> my name is miss n. maal , residing at 19 ***eon ave , lenasia , 1827 , I signed a 24 month contract with telkom mobile on the 19/05/2013 . the contract account number - *** , order number - ***0a , cell number *** expired 22/05/2015 . <br> <br> I called telkom mobile on the 22 /04/2015 to cancel the contract on the expiration date , which was on the 22/05/2015 . I was advised by the call center operator of telkom mobile that an agent will call me to offer me a renewal on the said contract or to confirm cancellation . no one called and I was billed . went into telkom mobile offices twice 08/08/ 2015 case-***4 then 9/11/2015 case-***5 .on 02/10/2015 we were contacted by mildred frans case-***5 and wer told contract will be cancelled and charges reversed . needless to say we were handed over to debt collectors . <br> <br> unfair cancellation policy , if telkom mobile does not call or we miss the call , we are billed , they never call back . they called once , but they called the secondary number , cancellation can only be made by the signee .they said they will call back but never did <br> <br> please help . what more can we do , we owe them nothing<br> <br> thanks <br> <br> n <br> <br> <br>