This is EXTREMELY serious!!! How do you think you did not get any benefits from claiming US citizenship if you say that was the only way to get a job?! That WAS the benefit you derived and it was through fraudulent misrepresentation. False claim to US citizenship makes you permanently inadmissible! NO WAIVER IS AVAILABLE unfortunately. There is really nothing to appeal as far as I can see since you answered the questions honestly and the honest answer results in your inadmissibility.
Admitted to practice in CA, AZ, IN and OH