GBIC — Branch/Agent Code on My Maxlife Policy causing reduced fund value

I received a call from Mr Vijay Singh pretending to be a representative of MaxLife from a cellphone number. He told me that I have branch code linked to my MaxLife Policy and I am paying 30% of interest as well as complete declared bonus to the branch, this is causing reduction in my fund value. He recommended that I should change it to individual code. This individual code would be generated by GBIC for which I need to share my personal details and pay security deposit to one of other Insurance companies (which will in turn sponsor my individual code). He gave me a complaint ID as well.
Next day I received call from an agent of GBIC who asked me my complain number. Both individuals had access to policy details as well as personal details (like DOB). He told me that he will call back in 30 mins with list of insurance companies ready to sponsor my Individual Code. Upon seeing the level of followup, similar background noises in both calls, the fact that both calls originated from cell phones instead of landlines or call centers and their insistence on 24-48 hour complaint life time, I decided to check with Max Life Helpline where I became aware about the scam.