The best place I know to find info on publishing scams is WriterBeware. There is also a blog to go with them. And a Facebook page.
Spend time there before spending any money on the publishing process. Losing hard-earned money to a slimeball isn't fun.
You can also Google, it's a wonderful way to get info.
I know the drive to get published. It often makes us blind to the scams and not so nice things out there. Take a deep breath, step back, and study things a bit. Don't get scammed.