My MP3 Player won't work

I just purchased the Coby MP705 MP3 player. I plugged it into my computer to put some songs on it and to let it charge. Everything worked perfect. So I then plugged it back into my computer to put more somgs on it an to let it finish charging. When it turned back on it got frozen at the start up screen. It doesn't even turn off. I have to press the reset button just to turn it off. I even contacted the tech support thru an email an ha no response. I dont want to feel like I wasted my money..how can this fix???