Does Bter.com respond to communication on contact channels given on English version of their site?
Few months ago, I personally found out that they communicate and respond promptly only via contacts given on the Chinese version of their site (click on the PRC flag in the upper right part of bter.com to get it). I had to use QQ IM (it has English-Chinese translation built-in) software to communicate with them in Beijing morning time. You could also try to contact them with other means listed at
https://bter.com/news/contacts (visible only when the language is set to Chinese) in case English contact channels don't work out.