I have had mine for about 6 months and I use it everyday in conditions that are bad for it and my headphones. It works fine, except for the volume button requires a little more effort than before. Try replacing the battery?
I read on the internet that if you hold the power on button for 1-2 minutes the device resets and this seems to work for my 2 players. I did also read about an issue with an internal wire connection that broke so hopefully this is not your problem.
Chrissie, I have noticed that mine started doing the same thing.. I figured out that if you pull the mini usb half way out of the mp3 player, it charges. Hopefully this will work for you. Otherwise, you can request a new one be sent.
That happened to me after two months -- wouldn't turn on; wouldn't charge; wouldn't do anything. Totally spontaneous; no idea why. But a week or so later it started working again -- no idea why THAT happened either. So I can't suggest anyone buy this, but Chrissie, don't throw it out yet; it might resurrect!