Type the password with a typo, you probably spelt your pw both times with a typo. Like for my phone and my hands, everytime i spell " on " i always spell " om " and when you redo your pw on your phone or anywhere else, you cant see what you typed unless you click the " show password " and thats even if whatever/where ever provides that option.
If that dont work, hit ATT up, they will jus have you verify you are who you are and bla bla bla