If she opened a Not As Described dispute, and returned the garment, she is entitled to a refund.
However, call Customer Service.
Explain that the garment is not in the same condition it was sent. Offer pictures of the returned garment.
If you don't want to talk to someone on the phone, eBay also has Twitter and Facebook accounts that are used for these problems.
You have a few days before you must refund, so call now.
If it has been more than five days, your complaint cannot be acted on.
I notice most of your high end designer garments are pre owned, but if this blouse was New With Tags returning it without the tags would win the Dispute for you. Also if any other ephemera (dust bags, numbering, etc.) are missing.
