Airtel — airtel internet connection problem

Address:

Kolkata, West Bengal, 700131

I m suffering from internet connection problem for the past two days. Whenever i m switching on mobile network it is showing emergency. I have tried to a no. Of ways to resolve like deactivate and then activate sim, switch off phone, checked whether the sim is placed properly or not - but nothing helped. This problem arised for the third time.. Please solve this problem asap or else i m leaving this connection and will never refer anyone about airtel...