I'm having the same problem. I ordered the game on 30th June from the EU SE store for digital download. I received my order confirmation and money left my account but it did not receive any pre order early access codes or anything yet. I have tried opening tickets on the SE support page but no answer there so far I imagine they are swamped with people contacting them.

I see you can find your codes by finding your order with Digital River, does this also apply to EU sales or only NA? If so do we know who the EU equivalent is so we can contact them directly?