I got employed by someone in Abu Dhabi and he...

You have to first file a complaint at court, citing the details of the incident in the complaint list, also mention the names that you have been dealing with, and include in the complaint list the names of all people who know the details of the incident to request their testimony, and you must also request by the list a claim to recover your money by the perpetrators
As for the legal basis of your case, it is a fraud crime according to the provisions of the penal code, and the penalty on r it is imprisonment and a fine. It is considred a fraudulent act if adopting a false name or an incorrect description whenever that would deceive the victim and make him / her surrender. Moreover, the same penalty shall be imposed on whoever disposes of a property or a movable who knows that he / she does not own it or does not have the right to dispose it or dispose something from it despite knowing that this act or contract would harm others."