2. 5 year boy too much obstinate. If.

My 2.5 year old boy is too much obstinate. He doesn't listen anyone keep doing things wrong. He doesn't care whether father mother uncle aunt. He does whatever he wants . And he willingly does all wrong deeds. And if anyone try make him understand he shout at and he beat with hands and with loose legs. We are very tensed . Due to his such behaviour our whole family has been disturbed. There is also 3 months girl in my home. He teases her and try to make her harm. He am frustrated with that child. He doesn't understand anything we say. Just try to injure other and not able then try to injure himself. I can say he is not good to live in family. Any medicine is there to help his anger or is there any govt institution for such child in India so we can left there. All family members are  fully frustrated with him..        If anyone  can help me pls help or tell any institution to take care till he understand . We are lower middle class family. We can't afford costly treatment.help if .