Hand loan

Hi,

Am Anand, 

I supported a person in his Odd times with an amount of  7.5 Lacs, Though he said to return my amount with interest in 6 months, he didnt returned and is trying to threaten me and my family.

He signed on 100 stamp paper about the amount and the time too, now he is not willing to pay and he is abusing me and threating me with some blank calls.

Pls advise me , as its now do or die kind of situation to me.

Regards.

Anand.