I know how you feel. Ebay should have removed the listing. I'm sure many members who saw the listings in here reported them. They sometimes remove the listings very quickly, but most of the times they are slow or don't do anything.
I understand you want to know why this is not authentic. But we don't disclose details anymore. This is a public forum and everybody including a fake maker, can join and learn. If you are interested, please check the reference section. You will find very useful info.
When you receive the bag, have it authenticated and file a claim on ebay. They might ask you a professional authenticator's letter. You can ask a help to Carol who is an authenticator ebay accepts.
www.caroldiva.com. If you need more help, please ask a help on the ebay forum.
http://forum.purseblog.com/ebay-forum/ I hope you will receive the refund smoothly.