MP3 player

I have a MP3 player which is made by unknown company. I think it's really cheap. I bought it on the internet auction and spent for it by about 5000 YEN. The specification of this MP3 is just having 1G, so I could install 250songs in it.
Today I usually tried to use it when I take a walk, but it didn't work. Though I checked battery and I checked a manual, I couldn't make it work. I'll send it to the company asking for fixing it tomorrow.