I do feel bad for your experience, and hopefully you can recoup some money by reselling them on ebay or similar. But to be honest, I would've been incredibly shocked if any shop agreed to take the skates back for a full refund after baking, sharpening, and skating in them.
You really really really need to try these things on before buying. And if you have to buy first, then at least get a second or third opinion on the fit before baking and sharpening.
Still, a crappy situation nonetheless.