Locked out of my ATT Yahoo sbcglobal email account

Locked out of my sbcglobal account

 I sent a Private Message a week ago to ATT Cares and not heard anything back,  how do I get access back into my yahoo sbcglobal.net e-mail account since I was locked out?  I've gone through the help thing but every time I click on password it freezes, so I choose user id or user id and password and get the same results. It says user ID sent to my email address but I am locked out of my email  so how do I get it? I can't find a phone number or use chat because an account number is required and I don't have an ATT account because I have prepaid tmobile  and no access to get ATT support.   All I want to do is log in to my e-mail but I can't find a phone number or access to the correct help center and one that will answer. Thanks