HBN Dairies & Allied Limited — They are not returning our my till now

Dear sir / madam My name is Thambi prabhakaran my mom is a government school headmaster she was joining as a agent by my father's name in HBN DAIRIES in the year of 2008. There are more than 170 members were joined by my mom in the HBN insurance policy. In 2013 more than 100 policies are matured then 2014 rest of the policies are matured but till now they doesn't return the money/ check / DD. So now the people who are joined by my mom are asking about their money to my mom. Each and every day they are coming to our house and warned us to give their money.we don't know what we can do so please help us to relive from this threatening. here i attach the details of name and certificate number and maturity date of the first 48 people so please do the needful sir/madam