[Resolved]  Airtel Prepaid — unauthorised deduction for value added services

My mobile phone no. is [protected] (chennai). I have suscribed to Airtel Prepaid. For the last several weeks I am pestered by messages from 543216 and 543216plus some additional numbers inviting me to chat or send sms to them. They indicate they are 22f, 23f, etc. signed with female names. I havenot responded to a single one of them except once to say that I have not subsribed to this service. The nuisance continues. Airtel has a customer complaint number where they direct you to another number (an official actually speaks to you here) but this other number has no provision for me to voice my complaint. It is all very tiring and nerve wracking to get to nowhere after all thisl.
A few days ago there was a call from [protected]. As soon as i responded it said thank you for becoming a subscriber to hello tunes. I have never asked for hello tunes either.
I'd like to know what i should do.