K98 is not charging Please help
 

I just bought this k98 china mobile phone
http://www.eemobi.cn/Products//3474/...K98.html#image
and its not charging anymore. I tried changing the charger once because it has a usb charger and it worked fine. Now its not charging again and after the battery drained its dead.

Could anyone help me out on this? Please tell me step by step of what should I do. We don't have china phone techies here by the way. Thanks a lot.