Oh, I'm sorry to hear that! Painfully tight shoes are the worst 😔. Have you tried on any of the tips posted here? I found that folding socks around my toes and blasting the shoes with a hairdryer works pretty well. I imagine the freezer bag/ice trick would stretch them quite a bit and save your feet the pain, but I've been a wee bit too scared to try it myself (don't think I even have room in my freezer to... haha). I noticed that you have to be a bit persistent with patent, I had to 'blow dry' them a few times as the patent seemed to 're-shape' itself if I hadn't worn them for a while after my initial stretching attempts. Hopefully they will stretch for you! But, if you don't think they'll ever fit then you could sell them and size up? Alternatively, you could, as you say, keep them as a souvenir... I keep my favourite ones in boxes for fear of ruining them, probably a waste but I just like to have them