HDFC Bank — HDFC Life Constant calls from various numbers

Dear Sir,
I wish to complain about constant calls from various numbers ([protected], [protected] and more) saying they are calling from the Policy Termination department of HDFC Life Insurance. The person told me that I had taken a policy in the year 2012 and paid a premium of Rs.50000/- towards the same, I was also given the policy number and told that since the policy has a lock in period of 3 years and I have paid the premium for only 1 year, my policy had gone to their department for termination. Then I was directed to some RM Kakkar, who is supposed to be my Relationship Manager ( who i have never heard of). I am sure I haven't got any policy like that ever and can understand that it is a fraudulent call.
My complaint is that I am being continuously harassed by these frauds. Request you to help.