Dear Iris,
In term of legal advice, I am not suggesting that you hire lawyer in different jurisdictions in every single event, but you should do it in a circumstance where there are uncertainty on legal issue instead of forcing us to give advice on every law of every jurisdiction in the world.
As suggesting earlier, what approach you or K Phichej would like to take should be agreed with Mr. Mithun. After that you have to terminate his contract in Kuwait and start fresh in UAE.