Converse Shoes Painful Blistering, Refund Denied

I'm utterly disappointed with my recent purchase of Converse high-top shoes, for which I paid a hefty sum of 2,600 TL. To my dismay, the shoes rubbed against the back of my foot and caused painful blisters. I only realized this issue when I wore them today. It's such a waste of money! I wanted to return them, but they are denying my request, claiming it's not a manufacturing defect. It's truly unbelievable! If you take a look at the photos, you'll see how it has hurt my foot. If they don't provide a refund or exchange for a new pair, I swear I will never use this brand again! This is unacceptable. Thank you. Not recommended.