AGAIN cannot login to sbcglobal.net email

I can't believe this is happening AGAIN; I have had to deal with this so many times, for the past several months the ONLY way I could access my sbcglobal.net email was on my iPhone.  Today I had to update the software and restart and now cannot get to login again.  I've tried other computers, every browser you can think of and the pages just won't load, att.com/myatt doesn't work, I have already been dealing with being told incorrectly that I have tried unsuccessfully to login too many times and have had to reset my password sometimes several times a day.  I am fed up with this, att is doing nothing to fix this problem that has been going on for years.  I want to change my email address and trash this one, but you cannot do that without access to your email!  I need help and it would be nice if I didn't have to keep doing this so many times.  Currently.com won't load either.  Search on Yahoo and you'll see this problem is affecting so many people there are pages and pages devoted to it. 
I have several legal documents linked to this email address and I cannot just lose it with no way to get back in.  PLEASE HELP!!