problems with yahoo

This is a question and maybe someone can help with it.

My girl friend gets a message to verify her identity when she try’s to log into her Yahoo account. She ask for the identity code to be sent to her G-Mail account and her cell via text and she gets no response from Yahoo. She has tried to call Yahoo Customer Support and get a message there to go on line. As everyone knows there is items In ones e-mail that is need to be retrieved but there is no way to get to it. So if anyone out there could help I would appreciate it.

Thank you

Randall