Obvious cheater didn't get banned during the game, is there anything more i can do?

I just played a game with a blatant cheater(instant shots, perfect accuracy, the works), and he didn't get banned during the game. is there anything else i can do to prove he's a cheater and get him banned? the whole lobby(at least my team and allegedly the other team) reported him, and that didn't help. i'm just wondering because i've only seen 2 other cheaters, who were less blatant than this, and they got banned during the match