Vodacom allowing 3rd party atomatic subscriptions without the consumer's consent

My wife received a bill highrt then usual. I realised she was subscribed to about 3 services (RTST, Baseplay Max and winsports). I searched through her messages and saw that sms's were sent where its free for 1 day and thereafter you pay a (~R15 or more etc) PER DAY in het spam messages thus see did not even see it. To unsubscribe, you have to click on a link and these days YOU should NOT click on links anyway!. I am furious that Vodacom is allowing such automatic sms subscriptions taking money without the consumer's consent. This happened a few months ago and I block any future subscriptions! but still it happened again!