Indian Railways — missing person reporting

Hi all
Request you to share any piece of information as my father is missing (His name is bam shankar thakur s/o late panchannad thakur,, age 55 year, color - fair, height - 5.7") while travelling from manmad to patna on 11th mar 2019. My address is 12d, thakur gangti, godda, jharkhand, 813208. Last call was received from him on 11th when train was crossing bhusawal station. Thereafter his mobile also not reachable. Patna police railway police has not accepted request for fir saying you don't have valid proof of train in which my father is travelling. Similarly bhagalpur railway police also refused to file fir saying since he was travelling from manmad to patna, patna railway is only responsible for taking fir.

Please help me on this. My contact number is [protected], [protected] (Shiv shankar, suraj)