Is there any real or manual way a support representative can help me get into my account ?

Hi Angelo, my name is Rodrigo. I'm an Independent Advisor and a member of the Microsoft community and I'd love to assist you today.

I truly am sorry to hear that.

Have you tried to fill out the recover account form?

Please, use this link:

https://account.live.com/acsr

Try all the troubleshoot available here: https://support.xbox.com/help/account-profile/manage-account/lost-password-solution">https://support.xbox.com/help/account-profile/manage-account/lost-password-solution

Keep in mind that, without access to your recovery e-mail and/or phone number (2FA), it is not possible to recover the account.

Please, read this:

"Microsoft takes your security very seriously, and to protect customer privacy we can only help customers verify their account ownership through the online password recovery process.

If you remember any new details that might help with the recovery process, we encourage you to keep trying to recover your account using the online account recovery form.

You might also want to create a new account at this point."

Source: https://support.xbox.com/help/account-profile/manage-account/lost-password-solution

I hope this helps!

Hi, my name is Marvina and I will be happy to help you.

I'm sorry you have this problem, researching on the internet I was able to find that in the forum, independent advisor Laura recommends the following steps for a solution.

In order for you to recover access to your Microsoft account, you must answer the Microsoft Account recovery form where a series of questions will be asked that you must answer. When you have had the score accepted by the server to change the password and access the account.

Note: The person who has access to the new validation means will be able to cancel any recovery process that is attempted, because they will be able to confirm the requested verification codes.

While filling out the form, we recommend that you keep the following information in mind that may be of help to you:

During this process, reply to the registration from a trusted computer or device that you're signed in to from Outlook.com.

Also, make sure that the data you entered when creating your account is as accurate as possible.

The form will ask you for message subjects and email addresses of other contacts. In this case of not remembering any information from the messages, check with your family, friends, study or work colleagues, if they have any email so that they can inform you of this information.

When you finish, the system will assign you a registration number that will be important to us. You will be able to see it in the secondary email that you added during the form and you will also be able to view it at the end.

Also, we recommend that you establish communication with XBOX support so that they can inform you if it is possible that while you recover the other account, you can transfer your Gamertag to another account and likewise the additional folders.

Information source (credits):
https://answers.microsoft.com/thread/5af99667-f2da-43bf-8828-bbdaacf9bffb

Best regards,
Marvina.

Support advised me to ask here, because they're out of ideas, save for just cutting my losses and starting a new account.

The support representative I spoke with seemed to think that an Xbox support member could possibly manually get the change password email sent to my current email. Or just tell me what's wrong with my Gamertag.

Hello Decca2, this is Manuela. I'm an Independent Advisor and community user like you, ready to assist with this.
Not a Microsoft employee.

I'm sorry to hear you lost access to your Microsoft account.
I appreciate the opportunity to let you know that no one at Microsoft can view, change the account details, or send password reset links to you, this is for security policies.

They can assist you with how to fill out the recovery form.

My issue was resolve by chatting with a representative and that is the fastest way to get your issue resolved. I had a great representative name, Rosanna, and helped me out after she verified me and everything.