Airtel Internet — Debiting money for not using mobile internet

Address:	600075
Website:	airtel.in

On 18.10.2015 at 11.40 p.m airtel as debited money from my main a/c for not using mobile internet. even I dnt use mobile internet. im using wifi only. I dnt even put a netpack. though im using my bsnl wifi connection they debited money for using airtel mobile internet. regarding this I called the customer care and talk but they are not responding properly.they are trying to bluff me. without proper notification and knowledge of the customers they are always debiting money from our account . if we ask they try to deceive me. so please I need proper solution for this. this make us mental stress and they are making fool o[censored]s. please make immediate action and help us.