Indian Railways — Change in provided coach

I booked a 2S ticket for janshatabdi12082train for my journey from ERN to CLT dated 26.08.2015. I was expecting a janshadabdi second sitting in which i could use my laptop(i m carrying my works on the way too..i m neither demanding nor expecting a dedicated charger port). But i got a normal passenger train seating in which i cud hardly sit. The fat man sitting next to me is encroaching my seat too..a seat splitter or hand could at least prevent his belly from hitting me frequently. I hav given Tatkal fare..rs.135+some extra to sum up rs.157. Two days later another rs.11.5 is to be deducted as irctc service charge. After all this expenses, i m getting a normal passenger sitting. This is as if i booked a 3tier ac ticket and i got a sleeper coach to travel. I guess i paid double than normal fare just to experience the comfort which i m denied off. Ticket examiner told me rather i shud register a complaint. Coach.D1.. PNR.[protected]