Forgotten Password and Invalid Email

I already know the account email, but I cannot recover the password without the backup email. I'm currently waiting on Tier 3 to contact me back on the issue and send me my info I need

Sorry to hear it. What you should do is call phone support. So long as you can answer some account specific questions they can let you know the email for the account.

Click the link below to get the number for your region.

support.xbox.com/contact-us

Sorry to hear it. If the email address does not exist and you forgot the password you may be out of luck. The best I can offer is to try changing the email associated with the account.

support.xbox.com/.../switch-gamertag-to-different-microsoft-account

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this Ben

As you don't remember your account email, I can advise you fill the account recovery form, in that way you're going to submit a ticket with Microsoft account recovery team
https://account.live.com/acsr

You can try all the emails you remember or if you had a phone number attached to the account, you can use that too. (SkypeID also works)

Sadly, an account cannot be recovered with the gamertag alone.

Also, you could try alternative methods to recover your account here:
https://support.microsoft.com/en-us/account-bil...

Please note that no one here including Microsoft Support is capable to send password reset links for security policies

You need to get in contact with support for your region with all the details you can remember. They may be able to reset the password for you.