Ebay user bocatmom purchased my painted buzz bee double shot for $100.

I received payment and sent the item with tracking. It was delivered on Oct. 30. Then on Nov 4, bocatmom issued a chargeback through paypal. I received this message from bocatmom the next day.
Dear autonerf,
I did not order this item. Please cancel the order if it has not been shipped. If it has I will refuse the item and it will be sent back to you. Thank you,
- bocatmom
When I informed bocatmom the item had tracking on it and it had been delivered a week ago, I got this reply.
Dear autonerf,
I did not order this item. The item did ship but the box was completely empty. No item. No packing slip. Nothing. I opened this box myself only because it was so light. I will be happy to send the box back to you. Please advise. Thank you,
- bocatmom
When I checked bocatmom's ebay purchase history, there were several other toys guns purchased in the last few weeks. According to bocatmom, I just randomly sent an empty box without even having an order for it. Who else would have ordered it, a magic genie?
Paypal is reviewing the case. If it is decided in the favor of the buyer, I will lose everything. What can I do about this? Has anyone had this kind of experience? Please help.
Everyone please go now to your ebay block bidder page, and add bocatmom. Don't let the same thing happen to you!
To everyone reading, if you are able please pm me the names of ebay users that you have had problems with so that I may add them to my list. I am tired of losing my guns and money. Thank you.