Can't get into Yahoo mail.

My wife is not able to login to her Yahoo mail. Here is what happened. She had her phone number changed and did not update her recovery phone number. Now she is logged out of Yahoo and can't receive a code to access her account . She also does not remember her recovery email login so she is locked out. Does anyone know how to contact Yahoo to get this reasolved? She has had this email account for fifteen years and all of her contacts are there. Thank you all for any and all help.

RickB