First time to seen a case from affiliated sectors, did you also already create on some other gambling site review/case too ? Example like (Casino Guru / AskGambler). Most the time they also have contact with casinos. Worth to try from my opinion, since to do these things is free on there and the site is also having a good moderated from gambling sector too. Suitable to solved or process any case from gambling sector, good luck for @OP.
I tried with Casinoguru and they said they can't deal with affiliate disputes. AskGamblers doesn't have Shuffle on their list of Casinos. I asked them to add it and will have to wait until they do.