Airtel — worst network of the year

Address:

501401

People need to cal 5 times (Atleast) to reach me everytime they cal it says not reachable
When i try to call someone it says call failed i need to turn on airplane mode and turn off and again call them
They say 4g but docomos 2g is faster then airtel internet
First of all i thought its decice issue now i changed to iphone 7 plus now the situation is more worse.
Everyday the cal ends in between the talk, then after not reachable
Please find a solution for this, cant miss all the calls on time
If the same continues i need to switch to another network