Can't click on anything on iphone

I can't click on anything on my phone. I also can't reset it because holding home + power for some reason doesn't work, so now it's just stuck at the lock screen because clicking the numbers to unlock passcode doesn't work.

This just randomly happened, my phone hasn't been damaged at all nor are there any viruses on it. If it helps, the last thing that happened before clicking stopped working was that I was getting spammed by the "Change Store" prompt because I was signed into my JP iTunes acc while still on the US store.

Also I can still click on the img thumbnail when I screenshot and even draw. Is there a fix? Because who knows how long it will be before my battery drains.