not turning on

Hi guys, I bought a new xiaomi phone yesterday. I upgraded its firmware to hyperOS. I used it for about 2 hours and left it charging overnight. In the morning I realized that it turned off and now it won't turn on anymore. What would you suggest to do? Do you think its a hardware issue?

Today my phone charge was showing at 0 but also wasn't saying it was going to power off or registering that it was charging in the first place, it was also being really laggy even after cleaning caches so I decided to reboot it but after powering it off it has not powered back on again. I have...