Airtel — SIM not working | NRI

Hello,

My Airtel prepaid SIM got corrupted and can't register on network. Spoke with 121 and found that number is still in service/active.

My father already visited the Airtel store but replacement SIM can't be provided to him.

I have moved to Canada recently and won't be visiting India any sooner, how can I get a new working SIM ? Any other solution ?

Thanks,
Tabish