Thanks for your quick and helpful reply. While this account I've used a temp email with my other account (the one in question) has been set up with an email address (one I have permanent access to). Hopefully it wont be too long before I hear back from them...!
Thanks again for the help! If you could keep your fingers and toes crossed for me too I'd be very grateful lol :D!
Want to leave a comment saying how woefully painful the 2FA is on this site. I'd ticked the box for 2FA on my account (assuming I'd receive a link or email). When I didn't I thought nothing of it and carried on my business. Turns out now I'm locked out of my account and cannot access it without providing a 2FA key (which I didn't set up).
I've contacted the instance admin (/u/sunaurus | @sunaurus) but their last comment/post was a month ago, so I'm a little worried if I'll ever get back into my (original) account.