desperately need HELP~~

someone throw a kitten near my house, didnt realize it, one of them is ded, another still alive.
try to save the alive one (1), but it doesnt want to eat or anything, it keeps shouting (cat language)
and i believe that this kitten is still relies on her/his mommy, untill now from 3pm he is being
calling for mommy for non stop. its quite weird, since the kitten is not as small as normally
a kitten does, it looks big (not like adult but bigger than average kitten that relies on mommy)

what should i do to save him/her? please help me ASAP.
i do not want this kitten to die and as if i let it be. i need some advice or help as
to save this kitten. around 3pm to 3.47am is a long time for a kitten to call for mommy.

my female cat is horny, it makes noise .. cant sleep...
is there any way to stop this? i read in some forum about
spray and stuff, but i have no knowledge of these.

tqvm

ooo misread spayed to sprayed.. lol, thats why i said, i dunno these stuff... haha