Cancelled but not??

It seems that Telkom is getting away with charging people for contracts that have been cancelled in writing at a branch by saying that they could not get hold of the person by telephone to confirm cancellation. Surely if a person goes into a branch and cancels in writing with a copy of ID in accordance with their terms and conditions then there is no need to call us??<br> <br> \4.1.3 Should a Customer fail to notify Telkom of its election to terminate or renew the Agreement