Well you can still leave a Response to your original feedback. This won't change her Ratings, but will bring attention to your poor experience.
Also, it's probably too late, but call the customer service number on the back of the credit card you use with your Paypal account and try to start a Chargeback. They also have deadlines, but the deadlines are longer. Worth a try.
For some reason, Dolls and Horse Tack are rather fraught categories for problems. Remind me never to buy a My Little Pony on eBay.