Indian Railways — mobile robbery

Sir, i am central government employee. I was working in 16339 (S1, s2, s3 coaches) train as a tte from madurai to nagercoil on[protected]. I put my mobile in charging after kovilpatti in s1 coach, after passing of tirunelveli station i realised that my mobile was robbed by some passenger. He may got down in maniyachi or tirunelveli. Due to continous duty as tte in train i could not able to give complaint directly in station.
I met grp available in nagaercoil staion after coming to my head quarter nagercoil, but they said i need to go tirunelveli and maniyachi to give complaint. I had already given my complaint through online in tamilnadu police website on[protected], but they disposed my complaint and saying its not comes under their category.
Sir, please help me to get my mobile phone back