Why won't my HTC Desire 626s turn back on?

[AC Question]

I was playing a popular, normal game (Clash of clans) And the phone would repeatedly shut down, then turn back on by itself. Then, last time I was on the game, it shut down and made a noise while at it. I can't turn the phone back on, nor charge it. It won't do anything. Every time it shut down, it would ask if I would like to send a report to HTC about it, I would every time. Now it's not working at all. What should I do?