There is no such lawsuit or legal claim as "false hiring" in our country. Employment in the U.S. is "employment at will"; this means that you have no guaranty of a job--either of having a job at all, or of a specific job--and your employer can change your job, assign to whatever job the employer wants, or even terminate you at will. They can promise to hire you as one thing, then make you another, and that is legal. Employment at will presupposes that if an employee does not like his or her job, he or she will seek a different job elsewhere--that is your recourse.