Airtel — network problem like data and voice

Address:

621729

Here more family's and office o[censored]s using airtel network and we don't get coverage of airtel network for the past 3 months. I complained about this 2times and one time, their service team come and check the coverage they also confirmed low network coverage available here and they said, they will forward the complaint. It happens before 2months. But till now there is no response from their side.