ICICI Bank — Threat Calls

Hi,

This morning I received a call from a person who was calling himself as the sub inspector of Delhi Police Patiala House and named him as Vijay Choudhary.
He told that a case is pending against my dad for non payment of ICICI card dues which has been issued at Nagpur . He asked me to contact Advocate Vijay Ramani for the case details .
My question to the bank is that we have never used a ICICI card issued at Nagpur . Then why are we getting such fake calls.