Fantasy Westward Journey sets up a stall to sell items at wrong prices. Where can I appeal?

No way. If you set up a stall and set the wrong price, the responsibility lies with you. If the transaction is deceived by the other party, there is still a slight possibility of recovery, because this is malicious deception by the other party. But if you set up a stall and set the wrong price, it is your own responsibility and you cannot blame anyone else. So even if you appeal, NetEase customer service will not help you get it back. You can only learn your own lessons to avoid something similar happening next time. I have seen many posts like yours on the official website forum. Many people asked customer service about the wrong price, but they refused to accept it because it was not a stolen account or a transaction fraud.