RBL Bank — harassing phone calls

Hello,
A person named "Prakash" claimed to work with RBL Bank in some Delhi branch in the loan department, is calling us continuously from yesterday. He told us that our neighbor, Ravinder Shaw has taken a loan of 5.5 lakhs from their bank and not repaying back and he has given our names as his guarantor.But in reality, we don't know anything about this matter.

Now, today they are calling randomly to our friends and family members and claiming that I and my husband has taken a loan of 5.5 lakhs and have fled away. Again I have no idea of where they are getting contact numbers and other information.We have lodged FIR in Dumdum Police Station, but they have asked us only to ignore the calls.

Please take necessary steps as this kind of calls are ruining our reputation.