My case was against the Betfair Casino , Betfair is an exchange so in general your just betting against other users Betfair doesn't have any liability.
I pursued the Casino through the Advertising Standards in the UK and so did other players , they found against Betfair but Betfair still withheld the funds , the only punishment for Betfair was not to use similar advertisement again. I hired a solicitor in the UK, my case against them was that they had no right taking back my money from my bank account. They froze my account for deposits and withdrawals with a considerable amount in it , I "chip dumped" the money to my wife's account and withdrew it. They settled out of court with a non disclosure clause.