i tried putting it in ziplock and freezermight be thats what killed it, you could try wrapping in in plastic and putting it in the freezer, to see if it will come back,
did that with my LG G4 that frequently overheated and became unusable, same with my innjoo fire, where the battery inflated like a marshmallow.
otherwise, this is what happens when you buy a phone with little aftermarket support in SA, Wileyfox swift V1, for instance
learned this lesson myself with all the weird and wonderful android phones out there. I owned some very good, but ARENT Samsung.
didnt switch in but was charging
went back in morning and nothing
i really didnt want to give in to samsung or apple