Airtel — unwanted data usage

Address:

Kanpur, Uttar Pradesh, 208001

I have taken the plan of 399 (1gb/day for 70days) but from 2 days my data pack is utilised very rapidly instead i am not using so much data. I had visited nearly airtel store to give me my data pack details but they didn't support. I am not using the data but in half of the day, how it is totally used i can't understand, please provide my internet accessible details and check it out.