why do you think he used MH? anyway, MH has to be reported in abuser section. But this is not proper report. You need to tell us why you think someone used MH, but in this case I doubt you can, as the player left before the game started. So maybe you uploaded the wrong replay?
if you want to report him for leaving this game, pls reply in here and tell us what this is about.
If we have no response till tonight, we will close this thread.
Thx,
Eunique