What should I do

Sir a very good friend of mine asked me to give a number of any guy because she wanted to to write a novel first time I said that I don't have nxt day she again asked ,again I refused to then after 4 -5 days she again asked than I became frustrated, than a guy he is like my brother can say God brother I asked him can I give ur number he said it's ok , than I gave her . They started talking each other and after that I don't know coz I stopped talking them both . Then her dad called on my number and said that she is saying that you tell her to talk to him than I said him everything, I thought by doing this he would not call me again, but yesterday he called me again and said that he has filled fir against me and I was pissed off than I asked him to givephone to the case in charge (I think he was lying ) coz he refused to give ,than he start saying shit about me and said that she's not in good condition -meh tumhe phasa k rhunga than I called tht guy ( with whom she used to talk) he said that he's not talking with her since 1 and half months and her dad also called him , he told them everything after that they never called him , now her dad is mentally tourchering meh plz tell me what to do