Airtel
Deduct of balance

I am using airtel card for my phone. i have used it as postpaid for 1 year and now using as prepaid. I never used caller tune facility any time . 15 days ago they deducted Rs.30 from my account and start the caller tune. when I asked for that they says from your phone you have dial some 57878 and so we can't give your money reward back. when I visited customer care center ther was a number of customer who has same problem and to all they answer them we will not give you the money reward back.