Negative Feedback

What do you do for unwarranted bad feedback? I bid on, won and paid for some hard to find body wash from thetreasureoutlet.
I only shelled out about $22 for the 3 bottles including shipping. I waited and waited. Nothing arrived. This purchase was to be part of a gift.
I won the auction a full 30 days before the party. Finally after 2 1/2 weeks the seller, thetreasureoutlet, sent me a note and told me some story about
her husband being in an accident. Ok then, I understood the delay. Another week goes by, and the party is in a few days. I was looking for the box every day. The day before the party, I received another note from thetreasureoutlet. Now she is saying that she has been so busy going back and forth to the hospital that she has hired a person to send out her orders. Well it is too late now. But about 8 days later the box arrives. I open it up and find there is no
body wash, but 12 poorly painted, cheaply made ceramic angels in there. OMG! What am I going to do with this junk? I emailed her. Never got a reply message, but three days later Paypal informed me that I received a refund for the money. I still have the box o crap. I am not sending it back on my dime with all that thetreasureoutlet put me through. But she never sent me a return anything. So when it came time for feedback, I gave her neutral feedback.
I think this was an overly generous gesture on my part! Then I come to find this horror of an Ebay seller thetreasureoutlet goes and gives me NEGATIVE feedback. For What??? For being me being jerked around by her?? This is a seller to BEWARE of. I can't believe I have no way of fighting this. Ebay should have some sort of disagreement arbitration without charging. My feedback score was perfect until this BAD SELLER, thetreasureoutlet, came in and ruined it with her revenge tactics. Do not shop with this seller if you know what is good for you!