My galaxy note4 is completwly unresponsive...Help

My Samsung note 4 one day starting intermediately working and it didn't work sometimes, then it starting showing errors like couldn't do normal boot and yesterday I had my phone at 4% and I turned it off. An hour later when I tried plugging it in it wasn't working, I tried taking out the battery for a few hours and even overnight and nothing fixed it, I hope someone can give me a fix for it because my phone is so important to me.

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