My iPhone 5S is less than one year-old and already stopped working?

Never dropped it and already stopped working, the screen is now totally blurry, I don't know what to do, I neve wet it neither.

Added (1). The iPhone is in perfect condition on the outside, but it is not working.

Ok what is the question?

Take it back to where you purchased it, iPhones have a one year Guarantee/ Warranty

My 4s is still going hard.