Vodacom caller tune on an elderly person's phone.you are ****** ****mers

Vodacome is taking advantage of our parents knowing very well that they cant do anything. How do u register a caller tune on someone 's phone and keep deducting R9 daily. She even had to buy another Vodacom SIM but still it's registered. When I am home I deactivate/deregister when coming back trying to call it's back again. That is day light ******* and this has been happening for years now. Your service/ network is *******. What ****es me off is that even when she does airtime advance you take that advance too. you need to pay her for all the years that she has been paying for something she ddnt subscribe to.