Vodafone — Deduction of money for no reason from the main balance.

An amount of Rs 18/- has been deducted from the main balance of my account. When I checked my Message Inbox, I noticed that I have received an SMS from VZ-ViCMS regarding the download of One97 which is not at all TRUE.Please note that I have not downloaded any application from the said page or website.
I spoke to the Customer Care executive, but they were telling that this was a third party application and not the problem of Idea. In spite of informing them that such a complaint was raised by many Vodafone Idea customers they were adamant saying that it is the mistake of the customers and not the company. The executive mentioned that all those customers whose money was debited might have downloaded some application and also to contact the handset customer care number.This is not acceptable and I demand my money back!