Airtel — Airtel sim card suddenly invalid while I am abroad.

Hello. I am Yajan Joshi and my airtel cell phone number is +91(xxxxxxxx00). I am running it on a One Plus 7T. Since the past one day my phone is displaying the following sim card error of which I am also attaching a picture. It reads "Invalid card. - Emergency calls only". I am currently in the United Kingdom pursuing my masters and won't be back until next year. But I really need either my sim to start functioning or a new sim with the same Indian numbe as that number is linked to various bank account and is used for 2 factor authentication purposes and i receive all of my various login otps on it. I urgently need a solution for this. Can my family in India get a duplicate airtel sim with the same number so atleast it is activated and all the otps and sms's come through? I have tried everything from reinserting my sim card into my phone and other ios and android devices to rebooting my phone into safe mode etc.. nothing is making the sim card work. I urgenly need a solution to this. Please help me. I have also tried making the complaint through twitter and the my airtel thanks app.