In such cases, customers can either recover their password following the series of steps as highlighted in the website, or get in touch with the Yahoo Customer Support team. The team first authenticates the identity of the user, and then based on the findings, shares a verification code to the users, using which the password can be reset.

For more info- https://www.youtube.com/watch?v=8MbiomrVsv4&feature=youtu.be