My iPhone 5s is completely dead?

I have tried everything, leaving it to charge for hours… Nothing, holding the power/home button… Nothing and connecting it to itunes… NOTHING.

Send it back to Apple for a discount on an iPhone X.

Not sure what your question is…

More likely than not, it is a hardware issue and can't be easily fixed. If you really wanted to save it, you could send it to Louis Rossman in New York City and he could probably fix it. Though I imagine he would charge quite a bit.