Vodacom / WASP / GameMine - Unauthorised subscription

I've noticed, after reading an article on MyBroadand, that Vodacom allows/act as a WASP service, allowing fees to be deducted from customers accounts. Having just checked the billing on my account, I've noticed that GameMine deducts R4,35 per day from my account as a type of subscription. I cannot remember that playing Soduko sometimes online, I ever had the option stating that it will cost met a set amount per day. Please explain to me whats happening?