Opened a support ticket with Steam:
Hundred Rabbits: "Our account address is, for some unknown reason, set to New Zealand, and we are trying to change it to Canada, but your site gives us a 404 when pressing the Change Location button on the Steamworks page."
Steam Support: "Your address has now been changed New Zealand, you should be all set now. You're welcome."
Hundred Rabbits: "Wait, what-"
@neauoire ChatGPT ass support system