Airtel — network issue , voice quality

Address:

560066

This complain i have been continuously following up with Airtel . since 2017 Jan. Today its july2018. my location is Bangalore, Whitefield area.
The voice quality is poor, due to network congestion the voice cracking occurs in 3G mode . where as in 4G VOLTE mode, i need to make multiple attempts to get one call connected . Its either not connected or mute call after connection.
The 2G has better quality than other 2. THe data speed is pathetic. its only showing in KBs.. even streaming video during FIFA was in buffering mode, rather than continuous play. There had only been false comitments related to fixing the issue . So i decided to switch to Vodafone.