Telkom WIFI

About a year ago my mother took a contract from telkom some wifi deal for R599 a month. she cancelled the deal within the allowed time but since last year the debits have still been going off. The biggest issue is that no one at the call centres or telkom stores seem to be able to help with this situation. My mother has made records of dates and times of the people whom she spoke to and no one seems willing to help so thanks once again for the pathetic service. This is why one company should not be allowed to have a monopoly. i dont even understand how telkom owns all icasa rights