Indian Railways — Another person has occupied my seat.

Address:

As of now the train has crossed Akbar Railway station

My name is Rameshwar Prasad and I'm travelling in the train: Doon Express (Train No. 13009), PNR:[protected]. As of now I'm in the coach A1, seat no. 07, AC2.
An unauthorised person has occupied my seat and allowed me to only sit in a corner of my seat. In fact, there are some more unothorised people who are siiting in my coach. He is saying that TC has assigned that seat to him. Please help me to get my seat.