I’m sorry that happened. The business sucks, but you’ll get through it.

I would be hesitant to let them use your work on their album though. If it didn’t “vibe” enough to keep you in the band then why would they want it? (Other than it’s good and they know it.)

You have every right to take back you intellectual property (barring no contracts otherwise.)

Start hitting up open mics and networking. Check out Bandmix, if you haven’t already, or Craigslist.