This company was not mis managed it appears that it was managed to make certain people money. Has for the cannon fodder (employees) you were all destined to be shafted and any of you that had misconceived ideas of any thing different were just lambs for the slaughter.
If you think that it could never happen to you should look at UK aviation history Cougar, British world, Excalibur Orion to name a few. Hoping to get your money owed I suspect that you are in for a long wait so you might as well put this one down to experience and get on with life and move forward.
If you want justice and retribution then hang in but dont hold you breath for a quick settlement. Maybe a better method would be to kick the living cr@p out of the people involved. (could affect future decision making) Won't solve anything for yourself, but could give you some personal satisfaction as long as you are willing to accept the consequences of your action