Vodafone India — Unknown deduction.

Address:

Nagaon, Assam, 782447

I m using a Vodafone number [protected]. I have kept this number for bank transactions otherwise it remains unused. Today suddenly i got a message that a VAS has been activated on my number. Now my question is that how can a service be activated if i don't do it and i stay alone so no matter that others will use my cellphone. Now i want my money refunded or this case will be forwarded to consumer court for fraud.