I want refund

I bought a peep toe heels on 30/11/2017 when I fitted the shoe I was fine it's my size. I wore the shoes and guess what it's not comfortable at all. It was hurting my toes so bad especially the big toe and I had to take it off. Today I went to Edger’s Claremont branch and the manage Yumna Edwards tells me there is nothing wrong with the shoe they can take I back if it’s a factory shop. I understand if it was a leather shoe it was going to stretch but this one is not hence it's hurting my toes. If they had a closed shoe I would swap it but they don’t have and I want my refund.