You know who reviews complaints about US ref's abuse here?
But if you want to make it formal and such, you really need evidence ie: screenshots or game recordings, not that it will ever amount to anything.
I point you to WarDragon, Spearwolf, and ZaphodTX.
This is what I remember from last night:
Player UMAD has called a vote: load map xr_kinixxx
Referee Nightmare has stopped the vote
UMAD: wtf why you stop vote
Nightmare: Because that map is shit/overplayed
UMAD: Oh I forgot, USA USA USA
~5seconds go by
Referee Nightmare has kicked $corch
Just an FYI: Slash doesn't care about ref complaints unless they come with a screenshot or demo.