REGARDING JOB FRAUD IN DUBAI (Dubai)

Hey friends

Can any one advice me what legal action taken for job fraud in dubai.

Recently i was in dubai on visit visa and got job.i work for 15 days unpaid in that company.after my visa got expired i supposed to back to my native.the company is free zone firm.they said i can join from april 1st n you'll get visa till 30th.when i called regarding status of visa they said it will take more 2 week because company's trade license got expired.

Do you think they are cheating on me.if yes what action can be taken.