In the end it was your own mistake that you submitted the wrong card to the set. You should always check the cards that were autofilled to the set before confirming it. Or if not always, at least with sets like this. In this case there were only 3 cards in the set, so it shouldn't have been too difficult to check.
the automatic to load in to a auto full when there are plenty other players that could have been used that were of a way less of a cost instead of using something so ridiculously high in price
I agree on this though. EA_Aljo Do you know how autofill picks the cards that it adds to a set from our collection? Is it random or is there some kind of logic behind it? It sometimes seems like it picks the cards that were most recently added to the collection, but I'm not sure if that's always the case. Anyway, it's clear that it doesn't always pick the best possible cards. For example in OP's case, if I understand correctly, it picked an upgradeable X-Factor card even though it could have picked a non-upgradeable X-Factor card. That shouldn't happen. It should prioritize non-upgradeable cards over upgradeable cards. Upgradeable cards show up first when we search for cards in our collection, and with the same logic autofill should use non-upgradeable cards whenever possible. And I think it should also prioritize untradeable cards over tradeable cards. And it should of course not stop working when it encounters a BND card. Do you know how autofill picks the cards and do you think it could be improved?
something you could quickly remedy yet won't
I believe you're right that EA would technically be able to give you the card that you accidentally submitted to the set. They might not be able to restore the exact same card with the upgrades that you had applied to it, but I believe they are able to see that you submitted that card to the set and therefore they could give you a new instance of that card. But for some reason they have decided not to return accidentally submitted cards. EA_Aljo Can you confirm or deny this?