Airtel — No Proper response in customer care

Address:

Madurai, Tamil Nadu

I am using airtel prepaid sim for last 6 months. I had recharged 1 week net card. I used that facility one or two days. I used to that for browsing only. But, I was charged from main balance in third day. I did not that much amount of data.I had called customer care for getting reason to charge amount from my main balance. But, that customer care executive not responded me properly.