This is kinda bad. Logic states all who bought a mislabeled product get a refund. Usually those products are what we in the business call "RECALLED."
Bioware. You will be sued over this. Do you really want to go down that road because you are being stubborn and not doing the right thing?
Auto refund everyone affected and stop being idiots.
Oh and this has been forwarded to video game news outlets.
Sued over a couple of pounds? Have fun paying legal fees.