Try using a different charger. It may be the Mac is not getting any power through the usb c or mag safe. Also try other outlets.
If this does not help and you tried ten second power button hold down with Mac plugged in I would call Apple and troubleshoot with customer service. If they can't give you steps to resolve the issue they may suggest support options to get your Mac fixed.
Good luck and I hope it resolves itself. Another idea is to just let it set for a day without using it and not plugged in. Then the next day try plugging in using various chargers and cables and see if it will boot up.