Vodacom illtreatment

I have a problem with Vodacom since early February about them automatically subscribing me to the Vodacom games and their subscriptions. I've lost a lot of airtime. Everytime when I log a call they send me messages that I've been unsubscribed but they keep on taking my airtime and sending me messages that the subscriptions will be renewed soon. I don't know what to do anymore because I don't play games and I don't subscribe on this things. I've got proof of smses and reference numbers of the querries that i have logged with Vodacom the latest being ref 1- ********** ********** . Everytime they tell me that they are sorry it will never happen again but this thing doesn't stop. Right now I don't have airtime and im afraid to load airtime because its gonna be taken by Vodacom subscriptions. My problem is I can't stop utilising the number because I have a contract with Vodacom where I'm paying R797.33 can someone please come to my aid