Lava Mobiles — Phone overheating

Address: 201301

Hi. I owe a phone Lava x81 and since today, from almost 3 hours early, phone is heating to the extreme. It is making me feel that this phone may blast anytime!
This is happening from 10/05/2017 since 2 AM. Phone is about to get blast and that is why I have kept it off! Due to heating, screen also has shattered!

I want the phone to be replaced entirely as it has only been 3 months that I have bought the phone! I need a replacement of the phone,