I paid 4000 to my employee to do labour card and...

If somebody offers you a job in the UAE, he has to give you an offer letter issued by the UAE's Ministry of Human Resources and Emiratisation (MoHRE). You can check the validity of such offer as stated below. Visit or tourist visa does not give you the right to work in the UAE. Working under a visitor or tourist visa may subject the person to penalties and legal liability.
If you have received a fake job offer, you can file a complaint at the police station against this person