How do i report!i need too!READ HERE!

Ok now i was playing a GM game on crossfire and i join and im doing fine and then i become 6-0 2ppl in ghost yell out "HACK HACK" and one went to far way to far here are links to the vid i capured on xfire and SS

http://www.xfire.com/profile/slayermanx23/screenshots/?view#94185948

there is link to the SS the vid is uploading -_-'
when i get the link for vid plz comment and vote cool!