Indigo Airlines — Bag missing from kolkata(MAA) airport indigo counter

Address:

603103

Yesterday i had flight by 23:10 and boarding timing was 45 minutes before departure but I reached late by 5 minutes and I had left my bag over there along with my certificate ( which I forgot to take out) kindly help me get my assets . Indigo counter ppl said you have leave it here itself or else you will miss the flight
pls update me ASAP
Thanks
Prabhakar Mahto