Looks like you can even be compensated for delay of wages too. Wages cannot be delayed and can be complained in Dept of Labor. Check if there is something on their website.
Looks like co. did smth illegal by not even paying you x $. If they were sincere they should have paid you at least x $. It is then on you to complain about $y-$x. But they seems to fail on even basic DOL rule. Check their website.