"Your XBox and EA Accounts Don't Match" - Hacked Account, or EA/MS Scam?

I am a subscriber to XBox Game Pass for PC. Yesterday I downloaded Titanfall 2 via the XBox app on my computer. When I launched Titanfall 2, the EA Desktop app also launched. But the EA ID that appeared for me was a random collection of letters and numbers that I did not recognize. TO BE ABSOLUTELY CLEAR: THE EA DESKTOP APP AUTOMATICALLY LAUNCHED WITH NO SIGN-IN REQUIRED, AND I WAS SHOWN AS HAVING THIS UNKNOWN, RANDOM USERNAME.

I logged in to EA.com using my real, actual, confirmed, legitimate username and password (though I had to change my password since it had been a while since I logged in). I confirmed that my real, actual account that is mine and that is linked to my actual email address is still active. I signed out of the EA Desktop app on my PC then re-signed in using my real, actual, legitimate username and password. After that, I went back to the XBox app on my PC and attempted to launch Titanfall 2. I received an error message stating, "Your XBox and EA Accounts Don't Match."

So, my primary concern is how to unlink a random EA ID that was either erroneously, automatically assigned to me or that someone hacked and created without my knowledge.

Furthermore, I have been researching this issue and also similar issues related to it, and the resulting responses from both EA and XBox support teams. From what I am reading (though I have not heard this from EA or Microsoft personally), if you cannot log in to your EA account there is no way to unlink it from your XBox account. If this false EA ID account was created without my knowledge, then the password and connected email address are also unknown to me. This would mean it is impossible for me to unlink the account. As a result, I would be entirely unable to play ANY of the EA online games via my XBox Game Pass subscription. To my mind, this is a direct violation and contradiction to the service that EA and Microsoft purport to provide. If their infrastructure is such that players can be directly prevented from accessing or playing the games on their platforms, is it possible for a class action or similar suit to be brought against them for false advertising, misrepresentation, unapproved financial transactions, etc.?

Of course, I would appreciate a resolution to my issue. But if the existing community posts that I am reading are any indication, the issue cannot be fixed. In that case, what recourse do we as consumers have?

Thanks.