Not sure, but I'm betting you live in an "at will" state, which means they can hire, or fire, you at their will, whim, whatever. They won't put theft on your stuff, because they can't prove it. Can you tell my hubby's been through this before?
You're getting shafted and it sucks, but don't resign. Then you can't even claim the pittance of unemployment, which helps while looking.
For the next jobs you apply, just say they restructured the stores and leadership, eliminating your position, since you were relatively new. Everyone buys that because it's going on all over.
Good luck, man.