ICICI Prudential Life Insurance — insurance claimed by fraud

Insurance of ex employee of icici bank has been done while she was suffering from sle (Incurable disease - patient with this can live life mostly upto 10-12 years) i. E cancer as she joined bank as saleswoman in somewhere 2013 or 2014. She was suffering from sle since 2006. She died in 2016 of sle and after her death her insurance was claimed by her father and icici bank paid the claim in lakhs. How is it possible that a employee of icici bank suffering from such disease got the icici life insurance policy. Its a big fraud.. Insurance was claimed by fraudulently. I don't have policy number but i know name of insured employee, father name (Who claimed policy), address, icici bank where she works.. I have all her medical reports of very reputed hospitals of 2006 and 2016 in which its clearly proved that she was suffering from such incurable disease. Its a serious concern and i need to file a complaint so that the matter to be clearly investigated.. I had filed many rti to icici bank in 2016 but no reply was there...