“Fine Print” is just that, but in this case, it was on the item, and not buried in some URL hidden Refund Policy at the time you cashed out. If you want to get into semantics…
When you go to the site, in the top right corner is even has USD as the default currency and the URL does not have a .ca in it anywhere. Nearly every digital code in WoW’s history has been US only.
I get it. You are embarrassed. You are pissed. It’s understandable. But if you have lived in CA longer than two weeks, you would have already experienced this with other online codes, even those not from Blizz. It applies to all of their digital content.
Even WoW’s own community council acknowledged it 3 weeks ago:
Continuing the discussion from External Promotions being US only:
Maybe some day they go global, until then, it’s just lesson learned.