R10 a day taken off my account

I noticed airtime disappearing off my account and when I phoned the call centre I was told there is R10 coming off my airtime daily for VIP Games. I never subscribed or agreed to this. He was unable to tell me how this happened or where it originated from but quick to stop the service. I don't even know how long this has been going on as I hardly use my airtime but low and behold I needed to make an urgent call today and had no airtime. I would like Vodacom to contact me so I can get a detailed account and to resolve this matter.