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.
Were you paid your affiliate commission up until the date of the ban? If so, there's not much more for you to do, or that anyone else can do. Shuffle is under no obligation to provide you with a withdrawal-only account.