Lost the email address and/or password to Xbox Live account.

To access your Xbox Live account, you must know both the email address and password that you use to sign in to your Microsoft account. If you have lost or forgotten your password, you will need to reset it in order to create a new password.

Important If you’ve forgotten both your Microsoft account email address
and your password, first retrieve your email address using the
Lost Account Solution, then
reset your password.

To access your Xbox Live account, you must know both the email address and password that you use to sign in to your Microsoft account. If you have lost or forgotten your password, you will need to reset
it in order to create a new password.

Important If you’ve forgotten
both your Microsoft account email address and your password, first retrieve your email address using the

Lost Account Solution, then reset your password.

To access your Xbox Live account, you must know both the email address and password that you use to sign in to your Microsoft account. If you have lost or forgotten your password, you will need to reset it in order to create a new password.

Important If you’ve forgotten both your Microsoft account email address
and your password, first retrieve your email address using the
Lost Account Solution, then reset your password.

To access your Xbox Live account, you must know both the email address and password that you use to sign in to your Microsoft account. If you have lost or forgotten your password, you will need to reset it in order to create a new password.

Important If you’ve forgotten both your Microsoft account email address
and your password, first retrieve your email address using the
Lost Account Solution, then reset your password.

https://support.microsoft.com/en-us/help/28808/microsoft-store-contact-support?ocid=MSCOMStoreFooter-ContactUs

You can talk to support, maybe they can help you man.