Dungeon Crusher is a server-based online multiplayer game. It's not possible to "lose" anything in the game, your profile returns to the last valid state in case of any technical issues.
The most common reason for "losing" a hero is the altar.
You should provide me the history of my actions associated with the items in question!
Please note, we can't and will not provide you the history of your actions associated with items in question. The support team don't respond to such requests.