You have to have a reason under law to win a case in court. Something being "unfair" from our perspective isn't enough - it need to be that they have broken a law. So your first step would be to try and figure out exactly what law you believe they broke and whether you can clearly prove it.
There will always be some lawyer willing to take your money for a hopeless case so being able to find someone to profit from you isn't a good measure of the legitimacy of a complaint.
Often times, things in life are unfair but we are as much responsible for it as anyone. It's our life and if we chose to go along with some crazy scheme then more fool us. But there's no law against making bad decisions.