***** and ******ion on vunerable people

I was approached one day by young people marketing this supposed company called Medic now and told me since I am a Capitec bank account holder that I qualify for a Pick n Pay voucher,they swiped my card in the machine and gave a slip confusing me and telling me I am going to receive a certain amount of voucher. I called thier contact number the same day to explain to the lady I did not agree to join anything and she should cancel if they bring anything to her. So one day they debited an amount I did not agree to or authorise and I couldn't reverse it or stop the debit order. a Capitec consultant advised me to call Medic now and tell them to cancel and refund my money,the lady on the phone was cold and told me I did authorize it when it was swiped through the machine,so she cannot refund me the money but she can cancel it. This company preys on vunerable people to ****** them.