Immediate action required

Dear sir, I have taken some money on friendship basis from mr.Mahesh chowdhary who stays in kandivali.He is 60 yrs old.But after some time I have given a certain amount.But now he started abusing to me and my family through sms and phone.And asking for huge amount which I have never taken from him.Also this transaction is on mutual basis.Even he dont have proof for this. Now my family and me are totally collapsed due to his vulgar language.And as his son (mr.Ishant chowdhary 699) is reporter in sahara samay news mr.Mahesh chowdhary is taking undo advantage. Please find below his detials.Mr.Mahesh chowdhary 756. Please help me .I am in big problem.Nobody even police department is not ready to help in this matter. Yours faithfully yogesh shahane ambernath