Angry at Akinga/Telkom

Like so many other reviews, I was also shocked to find money deducted for services that I did not sign up on Telkom platform. Unfortunately we are the ones that have to foot this bill. How can one stop this from happening again? I have canceled my subscription but only after I was already charged. I'm so frustrated with links attached to something that has no clear warning, although you have not subscribed to it..