If you logged off out of the KitPVP spawn, you would lose all kit items and not have protection. It's just a minor bug that happens once in a while, and if you want to get a new kit, do /suicide, then type /kit.
If you're still talking about the items you lost, like the god axes, swords, bows, and armor, I have a post on your refund request about it that you can read.
