They ******* my old mom into airtime subscription

My mother was sent an sms from Vodacom offering her a reward of a free R55 airtime. I the sms she was told to reply \yes\" if she accept the airtime. Just like an old village woman she rep**** yes thinking it is one of their promotions. All her problems began the moment she said yes to that sms. After that all her caller ID's and other things on her phone was blocked. she tried changing from one phone to another thinking there's a problem with the phone, but it didn't work. She then decided to do a sim swap, and Vodacom told her it cant be done because the sim is on contract. She explained that she doesn't have a contract but they insisted. They advised her to contact Jet and Edgars airtime helpline, which as her children did on her behalf. Those people told us they cancelled everything but they didn't. When we call they just say they'll revert back to us and they don't. This thing is really stressing my mother and she has serious health problems. She doesn't want any contract or their airtime. Just cancel whatever you did for havens sake. What kind of inhuman money scheme is this? And also tricking old people? these people are a disgrace to humanity. *** is their helpline."