I can not get to my previous email with sbcglobal.net or I am not getting a reply to change the password
so I wanted to change it to Gmail.com. Can anyone help me, please? Thank you

Not sure what you mean. Are you trying to change your password or your email?
Also, please provide your username. There are way too many users who use sbcglobal.com, so I won't be able to find your account based on this information.