I read this and immediately wanted to say "Chin up, Donna, things will get better". But then I thought people have to die for things to get better on that job and it just didn't sound right !

I would definitely want to talk with the owner, calmly, first and make sure that there isn't a misunderstanding, then explain to him how you were mislead and what it has cost you. Maybe he will reconsider and assure you of at least 20 hours/week. It couldn't hurt to ask. I think I'd have to be looking for something else too. Is that other job still available or do you feel comfortable even asking?

I hope things will look brighter for you soon, Donna, wherever you are.