Gaming Desktops

so i bought an hp omen 880-076no i January and from the start, something was wrong with it, i identified wrong and i wasn't running right so i had a talk with customer support and with a compleat factory reset i started running better and identifying as the model it was supposed to. but doing this i had a look at the cpu fan and it just looked small to me, it should be known i know very little about computer hardware today i used to repair computers when I was a kid 25 years ago

so i know little but i think i know enough to chance a cpu fan. but this is where i ran into a problem when i was talking to the tecksupport person i asked if i could put a bigger fan on, and was told "sure that fine by us and don't worry it's very easy" 

well now i've spent money on a noctur fan and an am4 mounting kit and nothing lines up 

my computer is a HP omen 880-076no ready build pc according to the hp web page my
motherboard is a

HP name: Higos

SSID: 8309

Form Factor

uATX

Dimensions: 24.0x24.0 cm (9.4x9.4 in)

Chipset

PROM2

Processor upgrade information

TDP: up to 95 W

Socket type: AM4

and as you can see it says it's an am4 but i must be dumb, blind or really have no
clue how a screw works becurs non of the older models that the fan comes with or
the new am4 kit you sent me lines up but for some very odd reason the intel mounts
seen to line up mostly.

anybody have any experience with this ??, if i need to buy a special HP -> am4 bracket or i can just modify one of the old brackets 

i hope you can help me see what im missing here it should fit right ?