Learning problem. To write and speak.

My child is now 4 yrs 7 months old. He is Sr.kg. He is unable to write the letters. He is able to write A,B,D and M. He writes Y upside down. I tried to make him write by threatening him, shouting him and hitting him. I also used to say I will go away and leave him alone. but still he doesn't write. He doesn't like to hold the pencil. When we give him chalk he likes to write above letters only. He likes to draw half moon and tyres of car. In numbers he can write 1,2,3,5. He writes 5 from bottom to top. He writes 7 from opposite direction. When we ask him what is your name., he will repeat the question instead of answering it. He repeats some sentences twice or thrice. Please suggest what should we do in such a case. How should we teach him to write and speak.