Airtel — I have lost my airtel sim

Address:

Nabarangpur, Odisha, 764059

I have lost my sim card long before and when today i called in that number someone picked... I want my number back and i lost it long before so i forgot all information like - in whose id it was registered etc. So please help me what do i dont understand. So plzz help, it is a airtel sim, that number is[protected], a girl is talking in that side and i dont know who it is. Plz provide me my number back