Buyer wants full refund, but does not want to return item

[crafty2gamma]

I have a buyer who is claiming a pair of flip flops is defective.  At first it appeared whe wanted to keep the shoes, so I offered a partial refund.  She wants a full refund & refuses to send the shoes back.  She claims they are useless (which I do not agree with).  She keeps mentioning my seller rating and says she does not want to open a case, as she knows this is detrimental to my seller rating.  She says returning them is too much trouble,  but they can be mailed first class in the original shipping envelope.  How can I resolve this?

Sorry, I should have mentioned that I was asking for my daughter. 

[missjen831]

If the buyer recieved the shoes more than 30 days ago, they cannot win an ebay case and feedback will be removed if they file a case. Hopefully if they follow through with their threats, they go through ebay and not PayPal!