There is no right to be paid early under law--that is, the employer is under no legal obligation to pay an employee earlier than the normal pay dates or schedule.If you had an employment contract which stipulated that you'd be paid earlier, that would be enforceable; however, a promise by the  CEO made *after* you had already accepted the job offer does not form an enforceable contract or agreement, since you did not give anything of value (any "consideration") in exchange for that promise; it is just a gratuitious promise, and gratiutious promises are not enforceable.