Excuse me for rude honesty, but all your "addons stole my gold and botched quest" sounds from developer's standpoint like utter Tauren crap. There's just one way in API to get you rid of gold through addon - that's mentioned above automated mail. As you can guess, there's no way it will work overnight when you're away from WoW. And exactly ZERO ways to make quest items disappear without retracting completed status for quest itself. Either provide more correct and informative fact or go troll somewhere else. If you're absolutely sure that things were going exactly the way you've said and this suggestion manages to persuade you that it got nothing to do with addons, I highly recommend you to contact Blizzard again and tell them to proceed, so they can track it to problem with either server, your account, or your account's security in case somebody is really figured out your password.