Airtel — call drop & bad internet speed

Address:

Mumbai City, Maharashtra, 400037

Most of time "all line are busy" and call drop and connecting to a call also take time and sometime just does not connect.
Internet speed worst. 4g just name sake, speed is just 2g.
Most part of mumbai is facing same issue after closure of rcom.
If paying for 4g plan need proper 4g speed and connecting to all webpage and social sites.