So I sent an item of makeup in brand new unused condition. Buyer receives and says that it's been used. I repeat it's brand new and seller then adds it looks like it may have melted??? 
I tell buyer if she returns I will refund her. Fair enough, buyer returns it by royal mail signed for & it looks used/melted or whatever. I refund the auction price plus 10% as a goodwill gesture via PayPal.
Buyer has now got snotty saying she expected the item price, p&p amount AND the return p&p she paid refunded.
Am I correct in saying I have been more than fair with her as the item left me in brand new condition, I had no returns on the listing but made a goodwill exception & have refunded item price plus 10%??
Many thanks