Remove Authenticator from account

Hi there,

I have an active Battlenet authenticator for an account that somehow is active for another account that is still mine. One of them are @yahoo.com wich is the first account I ever made and I activate the battlenet authenticator. After a time I manage to break my phone and I needed to replace it but I couldn’t remove or reset the battlenet authenticator. So I made a new account @gmail.com and managed somehow to create a new battlenet authenticator with the new phonei bought. After a few years of pause gaming I want to rejoin the community and I need to know if there is any way shape or form to get my first account (@yahoo.com) back so I can get my old account that I had so much time invested in.

Thank you in advance for your advice,

Jagqt