Friend blackmailing me to pay money for laptop he sold to help me

one of my friend told me about a company(qnet).this is a chaining process so he told me about that company nd suggested me to join.but i totally disagree with this.he forces me a lot so every time i said ohk ohkk lets see.and he registered me also in that. he say i sell my lappy 4 you.and our head mam paid for you.now you have to pay.i give my college fee(60k) to him.he said that he paid 1 lakh for me by seeling his lappy.if i wont pay the remaing money to him so the whole team come to my house and take some leagule step on me.now he is asking about remaing money.he never sold his lappy for me