How do I reset access to my root account. The current user has left the organisation and we no longer have access to his mobile or 2FA but we do have access to his email account?

How do I **reset ** access to my root account. The current user has left the organisation and we no longer have access to his mobile or 2FA but we do have access to his email account? I do have an administrator IAM User account but I want to reclaim access to the **root ** account.