I had to make a backup account because I can't sign into my existing account even though one is needed to contact support.
I got a series of emails from 9:20AM to 9:26AM saying that my password was requested to be reset, then an email saying my password was changed, then an email requesting a single use sign in code, then an email saying a new email address was added to my account, then an email saying my primary alias had been changed to the new email, and finally an email saying my original email address was removed from the account.
Shortly after at 9:26AM I got a text message saying my phone number had been removed from my account.
I tried to submit an account recovery form only to be told that no account existed using my old email address. So I tried to use the new email address that was added and had the information sent to a backup email address I had, only to be told (rather insultingly) that Microsoft takes privacy and security very seriously and they believed I was trying to break into an account that didn't belong to me.
So the hacker was given an open door to bypass my 2FA and change all of my information, but no matter how much information I provided to prove the account belonged to me I got turned down for "suspicious activity"
I've provided my name, card information including the name on the card and the last 4 digits used to make any purchases on the account (though this card has since been replaced so I didn't have the expiration date memorized) and information regarding the XBOX Network Device ID that I use with my Windows PC. I also provided my Gamertag, but the recovery form asked me which XBOX console I use my account on and I don't have an XBOX. I only use my account for PC games.
This has been a giant headache for me and I would really like this issue to be resolved. I can't seem to speak to an actual human about it and the customer service number keeps referring me to the website I had been using to submit the account recovery form.