GGDB Womens Hi Star with silver heel tab

I bought these online and didn’t realize that I could not return them to a GG store for a diff size…I tried to make them work (I wore three times…for one or two hours each time) but I need smaller! They are in perfect condition, I have the box, the dust bag and even silver shoelaces! I paid $621 but I’ll let them go for 500$(FIRM)!!!!! I really just want my money back to put towards a new pair that fit me correctly! Note: I wear a size 7 in all other shoes and these were just a bit too loose for my liking!