I'm not sure how it works where you are, but around here there are volunteer lawyers for the arts organizations that provide lawyers for just this kind of thing either for free or for a greatly reduced fee. Check into it. Call the local bar association and ask. Believe it or not, a lot of lawyer/bar organizations have outreach departments to give back to the communities. It's called pro bono. Despite the bad rap, they're not all sheisters.
Apart from that, you should do it yourself - do some googling and try to research the issue for yourself. You'd be surprised how much legal information there is on the web. It may not all be good, but if you do enough reading, you should get in the ballpark enough to make a decision as to what you want to do about this.
And sometimes, even if you're right, it's just not worth the aggravation to figh the fight - especially if you're a new band.
That's what I'd do. I hope this is helpful.