Dream11 Fantasy — my team got changed

Today i was playing in a ipl contest, kkr vs csk,
I was playing in 120 entry with 2 spots only,
My nd others team was same with 1 difference only, his wise captain was robin uthappa nd my was andre russell. I was winning the game as russel was my wise captain.
Between the game my 1 player i. E sunil naraine got replaced with dwayne bravo who was not playing the match and i lost the contest.
This is real injustice as dream 11 has changed my team in between.
My team name is chabbras 11 associated with the email address [protected]@gmail.com
Nd his team was named as anjumann 080211.
If dream 11 is really a safe site to to play then how did this happened.
Dream 11 is real fake & is filling his pocket by looting people..
An if dream 11 is really a fair play then do the justice nd prove it...