Recovery agent Harrassment

I had taken a personal loan from my father for business. I have had a good payment track record in the past but I suffered a loss in my business. We now live in a rented house and do not have any securities/insurance etc to pay the loans.

This is one of the reasons why there are many cheque bounces on my account now, although I’m repaying some loans. My father recently had a paralytic attack too. We are in deep trouble and do not know what to do. Recovery agents are harassing us and sometimes threaten us. Is there anything that can be done?