[AC Question]

Hello, I recently tried updating my Galaxy Note 4 (N910H) to Andriod Mashmellow using Odin after which when it tries starting up it says ur device is locked because of abnormal restore (something like this) please login to your Samsung Account Username and Password. When I enter username and password it says Processing Failed and i have been stuck on this for almost a week now. The phone is more than a year old with me now which i got brandnew sealed, I have used Odin to update severally but don't understand what happened this time.
Several steps have been followed like deleting account and recreating same account, changing of password, trying to flash in lower. RoMs but all this unsuccessful.