HTC — Htc desire 826, over heating and hanging

Address:

Visakhapatnam, Andhra Pradesh, 530007

Sir this is santosh kumar I am using HTC desire 826 from 8months it has a very heating problem we can't catch the phone and we can't keep near the ear.because it has that much heating problem, and while we connect to the net it was hanging for 15 min.
Plz give the needful suggestion, I bought it for 25500 rupees and 2000 rs for insurance