Wrong purchase for gender

I paid $600+ for these sandals, thinking they were for women, a size 7 is what I ordered but when they arrived, they didn’t fit her and I then found out I ordered mens sandals. (( So these sandals are a mens size 7 which would fit a woman size 9 )) I lagged on returning them as they just sat around in my closet. I have the original email receipt with my name on it to prove authenticity. Shoot me an offer that is reasonable OR LETS TRADE OF AN EQUAL VALUE OR MAYBE YOU HAVE A PAIR OF DESIGNER SOMETHINGS OF A SIZE 7 IN WOMANS…….