I am working in a private concern at Dubai for the past three months and received labour card, residence visa. I got a job in Abudhabi (free zone) for more salary. I am ready to pay the charges incurred by the existing employer for visa process.What is the procedure to join in new company?

Please answer for the question

I am working in a private concern at Dubai for the past three months and received labour card, residence visa. I got a job in Abudhabi (free zone) for more salary. I am ready to pay the charges incurred by the existing employer for visa process.What is the procedure to join in new company?