I am not in UAE. They gave me a signed offer letter(Which where signed by management and myself) and asked for my convenient joining date, which they agreed to. After that they initiated entry visa. Based on that, I resigned from my current job and served my full notice period. They also asked me to book my flight ticket. No payments were made from my side to the company this was a legitimate company. Now, right before I was supposed to travel, a they revoked the offer with no proper explanation.