Raise for an immigrant without visa...?

I am an illegal immigrant who been working for minimum wage for the last 8 years. I think my boss is taking the advantage of me, how can I get a raise? I only make about $450 a week and I work almost 57 hours. With my experience, I think I should receive at least $9.50 an hour. I understand I don't have a visa, but it doesn't mean I have to work for a slave deal. It really piss me off how some dumb, lazy citizens who don't have experience get pay more than me... I think this is unfair.... I am trying to do something about it, if you cannot help me, then refrain from answering this question, go find something else to do.