Railways — TT of the running train did not let them to sit on their confirm berth.

Address:

South Delhi, Delhi

My parents was having confirm 3AC class ticket on date 2/11/12 in train no. 18239/GAD NGP EXP: . TPNR No: [protected].They was having their ticket from DURG junction the authorities TT of the running train did not let them to sit on their confirm berth.Right now my parents are on their way just sitting in the train like a waiting list passenger, they are sitting on the floor, they are old also.
Please help me out and my parents.
I will be waiting for your reply.