Samsung Galaxy Prevail / Precedent

When I first bought the Galaxy Prevail I thought, "great, is has everything I need at such a good price!" Until.......a few days ago, when it started to re-boot over and over. It would turn off and on even when I am trying to make a call. It is getting really frustrating. I tried calling the Boost Call Care for tech advise and all I heard was "to re-boost or add money."
I went to their website and called the number they have posted for technical support...and got the same thing...money..money...money. How can I get in touch with a real human being that can tell me how to fix the problem?
This on and off business really sucks!