This reminds me of a few years back I bought all 3 Lunar forces before realising I needed to size down. I emailed twice but never received the response regarding a return so I just sent them as it was clear what to do in the T&Cs and the refund money just appeared in my PayPal account shortly after I tracked the package arriving. So that approach at least used to work once … but I have sent a couple of things back since where they were very quick to reply so maybe mail them again and hang on a little unless your deadline is getting tight!