Whatever relevance it holds, appealing decisions in Australia is usually a long and fruitless task, often followed by a large bill. Committees and boards rarely like to alter results unless there irrefutable evidence of result tampering.
Personal view on the situation is I hope the player in question is okay. At club level, It's just a game at the end of the day and I'd be content to know my mate is okay. If your player was injured through direct action of an opposition player that wasn't a result of natural play, then you may have a case, but unfortunately it seems like the ball is in the oppositions court so to speak. If they decide that they are happy to call it a draw, then you might get the result you're after.
Again, I hope the player in question is okay, and that the spirit of the game can have the last say.