Airtel — airtel mobile network not working in bellandur bangalore

Address: 560103

I have 2 numbers with airtel [protected] and [protected] with both the numbers am not getting any incoming calls and data network is not working, sometimes out going calls works this am observing from 18-nov-2017 i have raised multiple complaints with airtel but issue not resolved, i have checked with bellandur airtel service centre & they said this is expected as they are doing some server upgrades allover the bangalore they can't do anything untill the upgrade it finished.

Just for airtel server upgrades, airtel users needs to suffer, more importantly no incoming calls which is a big thing as am not able to receive call from my family and also i have some expected couriers and they were not able to reach me and am missing the couriers.

Airtle can do server upgrades but ideally it should not impact on the users mobile communications.