Airtel — call dropping & network issue

There is literally no network coverage at work as well as home location. Vikhroli eaat & thane west.
99% of times i gets call but no voice reaches to caller.
Internet connectivity is very poor.
I took connection as corporate group available for but facing so much issues.
In their ads they show something which is nit even closer to actual use, tried to lodge complaint but most of times helpdesk nos dontnget answered.
Worst experience.