I had the same issue.

My code refreshed from early access to the normal one when I tried to cancel the order and received the error "You can not cancel the order because you already unlocked the code" (Which I never did btw, never had the green button that's supposed to be there)

After a couple hours of that I also received an email that "Your order has been placed" despite not doing any further action in the store.

I don't think I'll ever buy from the official SE store again, it's been fiasco after fiasco. Manual verification of my order for example, despite having an account for 6 years and always using the same payment method.