I think what you actually happened was, you thought you could just make your characters instantly level 30 now and reap the benefits of getting to 31 quicker and neglected to read that you would lose all of your characters, their gens and their items and would be unable to level to 31, but are too embaressed to say so.
Regardless of what you did, no one is going to believe you 'accidently skipped the fun' which required you to input your password and I hate to say it, even if you somehow did, I can't imagine it will be returned to normal, unless there is some kind of history on the database that shows you did have 5th gen character, then maybe chadz will have mercy, if not, I don't see them just handing out a 5th gen character without evidence.