Airtel — poor/ no network connection for airtel mobile

Address:

Ranga Reddy, Andhra Pradesh, 500019

Very poor network connection. No internet connection though the signal bar indicates 4g.
One of the representative said, it would take 90 days to get the issue resolved.
Request to refund the bill amount till the issue is resolved and proper network is provided by airtel.

I loged a complaint on 15th august 2017 and the issue is not yet resolved.