Tata Docomo — Unwanted Value added services

Address:

Coimbatore, Tamil Nadu

My name is M . Muthu Raman. I am using TATA DOCOMO prepaid mobile service in TN circle for about three months. My mobile Number is [protected].
Yesterday they sent a message saying that a new additional service had been added. For that they had deducted an amount of Rs.30 from my account.
I didn't call any service. I don't know why they added the service. So I kindly request you people to take necessary action to roll back the service and give back the money that they have deducted from my account.