Why have you made it impossible for me to get into my email?

I have an old email account that used to be with SBC, but it's with ATT now. Everytime I go to sign in now it says I made too many attempts when I have made only one! This happens everytime now, and I have to call ATT, which takes forever. Why are you doing this to me. Why can't the account just work like it always did. What is your problem! I'm disabled, not super computer literate, and can't deal with this!