Airtel — sim card rejected - outside india

I am currently out of india and my indian airtel prepaid sim card is rejected. There is enough balance and validity on the sim. When contacted customer care they are asking me to visit the airtel store personally to get a new sim but i will not be visiting india until the end of next year and i need my sim activated for otp purposes. I can send my family members to the store but they say it’s not acceptable. Please help me reinstate my airtel sim
Thanks