What's the actual issue you're having with the log in?
@Turelus - EU PC Megaserver "Don't count on others for help. In the end each of us is in this alone. The survivors are those who know how to look out for themselves."
If it was a recent password change it's possible it just hasn't registered yet, if this has been going on a while then you're going to need support from ZOS.
Remember you can also submit tickets from in game.
@Turelus - EU PC Megaserver "Don't count on others for help. In the end each of us is in this alone. The survivors are those who know how to look out for themselves."