BIGTREE Black Chunky Heels Size 41

These BIGTREE chunky heels are black with a buckle closure. They're a size 41 which is a US/CA size 10.5 or 11. They are brand new, never worn. Paid $100 for them and were bought last minute for me to wear for my wedding last month but they are too big. And the lady at the store would not do any refunds or exchanges! Paid $100 asking $60