Retirement Benefits

I Minati Ganguly, widow of Shri Pran Kumar Ganguly. My Husband wan an employee of Damodar Valley Corporation (DVC), PPO No.19340. He retired on 31.03.2009 as Senior Store Keeper. Till date no retirement benefits has been received except pension. My Husband sent so many letters to DVC asking for his dues, but nothing solved. My husband died on 25.11.2016. After his death, my situation become worst as the pension comes half. I have sent so many mails to the DVC officials as well as power ministry to release my husband's dues. But unfortunately no reply. I have filed a complaint to Prime Minister Office (PMO) through www.pgportal.gov.in on 16th June 2017 but till date no reply. On 30.08.2017 I have filed an RTI online application to know the status of my husband's dues, they replied that nothing has been pending from their side. My financial situation is very poor as I don't have any other income source, my only daughter stays with her in-laws. I don't have so much money file cases against DVC. Please suggest.