TELKOM WIFI CXL PROCESS

I have for the last 6 month tried to get hold of Telkom to CANCEL my daughters WIFI contract has she is no longer employed. I have been to the branch that I purchased the contract, they cannot assist I have to call Telkom which is always unsuccessful. Their option is that I must go online and register...if my child is unemployed where will she have the funds for data to follow this process. What was the purpose of selling the product at a store but they cannot assist with cancelling or changing banking details or in general they UNABLE TO ASSIST IF IT IS NOT A SALE! Their billing service is a ******* and they do not explain this on the onset, they will double bill you for every late entry but they will not call to query why?