Airtel
Abnormal deduction in Prepaid balance

HI

I had rechagred my mobile for 222 STD pack which gives me talktime of 333 and also recharged for 1Re STD packk. For the past 1 week i am noticing that even if i make a call for 15 minutes amount deducted is double.

sometimes the logic to deduct is more than 40 Rs. difference.

what to do