Mr. Zain is your boss, He signed contract with you and you cannot stay away from him until the contract ends.

and he loves torturing you and putting more work on you for no reason. He enjoys torturing you

He's calling you now: Hey, little one, get me all the files I need now, and Bring me a cup of coffee. I'm waiting. Then he says coldly and provocatively you can go. He gestures to you to leave