I'm so sorry that its come to this and both you and your buyer are upset about this transaction
I cant comment on the quality of any of these wings since I only own original ones, however I think that you did show pics and describe them as best you could, and if the buyer wasnt happy with them then she should have just asked to return them for a full refund. Normally the buyer will pay the shipping back to you (thats how it works on ebay) , or if you both agreed to it then maybe pay half the return shipping each, but whats been done has been done.
I dont think there is any more to say. I'm sad that things have turned out so badly and that you feel you dont want to be selling here anymore and I wish there was a way to make things better