Dr. Jack Lynn ADMA OPCO - ADMA OPCO JOB SCAM

I was recently scamed by some guys in the Middle East and these guys have a very well prepared set-up. I posted for a job in ADMA OPCO trough a web site Info Oil Careers (http://careers.infooil.com/fx/jobs/listings/1.363039/various.employment....).
A week later I received an e-mail form Dr. jack Lynn from ADMA OPCO telling me that I have been preselected and have to fill some type of pre-employment form. I fill the form and send it. Two days letter I receive a second e-mail for filling an interview questionnaire, which, seemed as good as others I have looked before. I fill the questionnaire and send it. A week later I received a third e-mail saying that I am going to be hired and the attachments have the contract agreement. I read all the documents, send them to a couple of friend who live in the Middle East, and they say to me it looks ok.
Once I send the contract signed, Dr. Jack Lynn writes me to inform me that I have to contact the EDD (Emirates Diplomat Department) because they will serve as my agents in the UAE for getting my paperwork done. I send an email to the EDD Prof. Khalifa Ahmed Mohammed (emiratediplomats@netcourrier.com +971-50-8493709) explaining my situation. He responded me immediately telling he will start to work on my working visa. In the mean time I am receiving from call from the UAE from Dr. Jack Lynn in order to be updated of the process.
A week later I receive a mail from the EDD with all the forms I have to fill to get the work visas and a letter which explain the nature of their services and the fees I have to pay. The fee is around $1800 (USD). I failed at that point to discover it was a scam an I did a Western Union money transfer to the UAE.
At this point Dr. Jack Lynn continues to call me every day, which gives me the impression that everything is ok. A week later the EDD informs me to get in contact with the MOFA (Ministry of foreign affairs) and pay a second fee. That’s when everything started to be suspicious.
To make the story short, this guys are scam artist an take their time in order to get a lot of money from you, so beware of job offers like this.