Why do Bioware think I'm Canadian?
Solution 1:
According to this post by a BioWare developer it depends on your EA account settings. Change your country there and you should be good to go. It seems the default value is Canada.
EDIT: It seems you are far from being the only honorary Canadian out there but no matter how great of a site Gaming StackExchange is, there isn't anything we can help you with (well, besides our endless spiritual support, of course!). Perhaps you could try contacting BioWare via their official support channels and demand they threat you as the proud subject of Her Majesty the Queen you most definitely are. Or alternatively keep it calm and quiet until their grace bestows upon you a trip back from the colonies.