Try to relax!
Danger was trying to help you. Nobody thinks you're stupid ... but you installed the wrong firrware so ...
I had a similar problem with my KT (from a Kobo update: see my posts): there is no miracle solution. I suggest you to be patient, even wait that the battery is fully discharged.
Playing with all functions reset you know your KT will perhaps restart.
Otherwise, you'll have to get another.