I am really pissed of yahoo because of I am not ab...

I am really pissed of yahoo because of I am not able to recover my email. first of all someone else changed my password and change security question. When I tried to recover my account, asked me unknown question. I really need to access that yahoo mail. When I enter my phone for recover it took me to someone else email. Can someone help me on this? How I can access to my yahoo for once so I can send all my email to other email. Please post best comment here. I have tried everything which stupid yahoo help page shows.