They made it clear that they don’t want you to play at their casino. According to their ToS they have every right to do so and you can’t complain about it.

You claim that one of your affiliates played there and that you’re owed affiliate commission ($250). Well, all they have to do is to show that your affiliate was also banned and that all of his deposits were refunded.
Let’s wait for Betcoin.ag’s response and see if they can confirm this..