I'm not gonna lie to you gang, I'm having that issue and I saw one other dude having this issue too. I'm pretty sure that there literally is no way to unlink if there's no access to the inbox that the code is being sent to. That's just the way they've set it up and it looks like they didn't take this into account so there's no fix. My recommendation, even though it's probably not going to the one you want to hear, is to make a whole new account specifically for the EA stuff (if you even care that much, I wouldn't blame you if you didn't). It's some bs for sure I'm sorry I can't help more
