Automatic subscriptions to "Content services" without appropriate client authorisation

Vodacom should not allow your personal data to be shared with third party services who are then able to somehow subscribe you to their services which are charged at a daily rate - and added to your Vodacom account on top of it! Where are the checks and balances to protect the consumer?? My husband has experienced this. I reported it to Vodacom via Facebook messenger. Very unhelpful response! I think he deserves a refund and assurance that this will not happen again. Or move to another service provider that can be trusted.