Autosubscribing users without consent resulting in ****** Airtime.

Vodacom, why are you auto subscribing people to services that we do not consent to? I received a message stating that I am subscribed to Mobile Maestro costing R7 per day, and also Teensup costing R10 per day.. I did not notice these SMS's because I get alot of Vodacom spam sms's and noticed my airtime is vanishing.. I did not consent to this.. why are you *****ing my money? I have now unsubscribed, but this is *****.