Deccan Queen - मेरे सपनों की रानी

I traveled by this duronto many times but it was nightmare on 09-Nov-12. I got stuck in worst traffic jam in HYD and reached Sec station just 10 min before train departure. My ticket status was wl-1 and wl-2 which got confirmed around 9.30 PM.
When I reached near my coach, I went and checked my seat number on coach chart. It was same as it was on internet status.
But, when I reach to my berth, there was another family. They said, their berth is confirm from day 1 and have...
more...

confirmed ticket with them. They actually had printout while I had waiting list printout. I said go outside and check train chart but they refused as train was about to start journey.
Luckily, TC came in coach. In TC's chart my name was present too.
Then surprise came, that family was holding ticket of same berth, same coach, same date but.........
different train. They had book ticket 3 and half month before in Hyderabad -Pune train by error. I don't know whose.
Again, they approached to TC and asked me to accommodate in vacant berth. TC told them that he will charge double fare for each one and they were agreed.
Then, I have been asked to move to A2 coach as they had too much luggage and kids with them.
I went and checked new berth, it was good so I went to new berth.
Surprise was A2 coach was 40 % vacant when I checked next day chart paste on coach. I found that berths were actually didn't allocated to anyone. This train had additional AC-II tier coach too.
Now, my question is how come TC charged them double fare and why so many berths were vacant when waiting list was so huge.
Please someone let me know where I should complaint for both points.
Thanks.