Harassed by Debt Collectors: What to Do?

I received a disturbing call on Friday from an unknown number.  They claimed my ex-colleague, Mansi, had borrowed money and listed me as a reference.  This is completely false; I haven't spoken to Mansi in months and she certainly doesn't have my number.  The caller became aggressive when I denied any connection. After I suggested they contact the police, they bombarded me with calls.  The harassment continued this morning, prompting me to forward the calls to my father.  They're still insisting I'm responsible for Mansi's debt.  This relentless harassment is incredibly stressful.  What legal recourse do I have to stop these calls?  Beyond changing my number, what other steps can I take to protect myself from this situation?  This is a growing problem, with many people facing similar debt collection harassment. Sharing experiences and solutions can help others facing this issue.  Experts suggest documenting every call, including time, date, and caller ID (if available), and reporting the harassment to the relevant authorities.  Remember, you are not responsible for someone else's debt, and persistent harassment is illegal.  Let's discuss effective strategies for dealing with this type of debt collection abuse.