Airtel — POSTPAID SIM SUDDENLY STOP WORKING WITHOUT INTIMATION (during lockdown)

Address:

Bharti Airtel Telecommunication Services Company, UP West,

Airtel Post Paid Mobile No - not working.
must be for upgradation of the existing SIM card.
present sit - lock down and unable to go to airtel store.
PROBLEM- this was primary number, and I am govt servant, this numbeer is very important as I was using this with official purpose also.

No help from Airtel CC, however i ve wasted solid many hours calling them.
all calls to CC have been recorded also by me.

Being Govt servant and lock down i have become non functional as every thing was related with the Airtel Post Paid mobile number.

Upgradation of SIM by Bharti Airtel at this time (pandemic and lock down) to earn just 25 Rupees does not seem justified.

kindly instuct the Bharti Airtel to not become over earner at this time when the entire country is fighting with pendemic.