Hello Stephen Duarte,
Welcome to Microsoft Q&A forum.
To access an account when you no longer have access to the security email, you will need to fill out whether the Password Reset Form or the Account Recovery Form, however, they will need some information to make sure that you are the rightful owner of the account. Forum moderators, even live Microsoft Support, cannot help in this.
If you cannot fill out the form, you can try to see if there are any device that your account is still logging in, if that's the case, you can change your password and the recovery method there. However, it will go through 30 days wait period for the recovery method change.
Thank you for your understanding.