Banks coming over to Parental Home for my siblings Loan Default

Hello, So the issue being, my brother who has taken some loans from banks has defaulted. We have not been in touch with him, because of his ways from the past 7-8 years. Now the banks are coming over to my paternal house, and pestering my parents, as my brothers whereabouts are in question. We are absolutely sure we have not cosigned any documents for any loans, the only connection we have is that my brothers Aadhaar card has my paternal home address. So the agents keep coming and pestering them, sometimes they make up stories saying their name has been in as a co applicant, or they will take this property, or publish their names in the press and the latest being bring the cops in. This is causing undue stress to them, they also ask them to call my brother up from their phones, for which i had instructed them to never do, as then they will keep on doing that. We don't want to have any relation to my brother or his dealings, and the loans and everything is between him and the banks. I needed to know, is there any legal way to stop these agents to come, we understand that that's their job and they need to inquire, but then these guys keep making stories and threatening my parents. Kindly advise, would appreciate any guidance. thanks