First and foremost, your password issues are not ezccs issue. With that out of the way here what I suggest.
Test your passwords outside of ezccs at both ft.ual.com and ccs.ual.com. The passwords characters will be the same for both. It is possible that your password will work for ft.ual.com and not ccs.ual.com. Once your password works for both you can use ezccs. Work out your password issues outside of ezccs. Here is who you call 847-700-5800. That is United's IT number.
IF you keep getting locked out of ccs.ual.com the most common reason is you did not update EVERY app/program that is setup to use your unted.com email. Email apps/programs attempt to log into the united.com mail server and after a few attempts, you will be locked out of ccs.ual.com. This is never an ezccs issue.