GFCI outlet wont work. wont reset. reset button wont push in. indicator light stays off?

I think its broken? it WAS working when initially installed. but then suddenly quit working out of the blue. tried turning the circuit breaker off to it and pressing reset and stuff and it doesnt do anything. it doesnt output any power anymore.
Update: It was brand newly installed just a few weeks ago. not old.
Update 2: There WASNT one where there should be one. by the sink in the kitchen where the toaster would go. all outlets near water had been replaced with GFCI outlets recently. but that one stopped working when my mom "tested" it. the reset button wouldn't work.
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