I too got it waived off by calling CC.
According to him, this service got automatically activated on almost all Delhi Airtel Landline phones. It was free for the first 2 months n would get converted to a paid one from the 3rd month. And, if anyone likes to discontinue it, he/she can make a call to the CC for the same.
However, I asked him a simple question - U never told me tht you have activated this service and how the hell I wud be aware tht this wud be a paid service from the 3rd month? At least a call from your side would have made things better. Never expected that AIRTEL wud go tht down to earn some profit.
He recorded the complaint n waived of the Caller Tune charge from my bill :thumbsup: