First, pray about ur situation. Then, I would go to him and schedule a meeting between u to talk about how ur feeling. After that, follow the Lord about what decision to make.
Did u receive all these promises in writing? If not, then it's gonna be pretty hard for u to legally get what ur owed since there wasn't a written agreement.
However this situation turns out, make sure u learn from this. Get everything in writing, don't take anybody's word for it. When push comes to shove, they will back out and leave u in the dust.