A Lawyer will cost you too much but you will never get any better. You will have to submit all documents translated into Arabic + to be proved by concerned department.... My advice to you sister, try to solve things out peacefully, register the baby so that he would be able to know who is his father in the future so as not to blame you once he is grown, discuss things with the father and prove to him that you don t want anything from him n order to be encouraged to reply to your appeals. I am so sorry for you and the babe, and so sorry because you described him "Muslim". In Islam, husbands do not leave their wives for whatever reason, this guy will not be a real Muslim.

Good luck sister