Hi @Scott Kelley and sorry to hear about your issue. An XBOX account is tied to a Microsoft account whose main alias /email can be changed. In that case the Microsoft account recovery form is the fastest way to get your password reset if you can provide enough info. If not you can keep retyring if you can provide new information. Please go once more trough the Help with the Microsoft account recovery form for tips and suggestions that can improve your chance of recovery such as:
- Fill out the form from a recognized device and location.
- Answer as many questions as you can as thoroughly as possible. If you’re not sure, guessing is ok — wrong answers don’t count against you
- You'll be asked to provide the hardware ID of a console that you’ve used frequently. Make sure you get the ID from a console you use a lot
- Check your web browsers to see if you saved a password there
After you complete the form, you'll receive an email acknowledging that your request has been received. You’ll then receive a response to that request within 24 hours. If that's not the case please reach back to us.
My suggestion is to delete the accidentally created Microsoft account (due to sharing the old email address) and create or use a different one for recovery purposes to avoid any confusion.