What they are doing is literally robbery and they should be dragged to court.
Good luck with that... especially when your lawyer will ask you about the ToS.
This doesn't mean that it's okay that they don't refund the money, I lost about 1 BTC myself from my account so obviously I'm not happy with it. But the most efficient way not to get ****ed again is just to set the auto payout threshold as low as reasonable (i.e. at least once every day).
A lawyer will say you, that the TOS are not lawful.
They will also ask you if the TOS were published to the Date when registered. And every Screenshot says "no".
In german rights: you have to announce every change of a TOS and send every customer an e-mail or a mail by postial services. The customer got now a 4 week "Sonderkündigungsrecht". When the customer say nothing the new TOS will become lawful.
So their first mistake: They didn't announce the ToS so there will be no ToS.
Second mistake: German webserver, German Translation, so designed for german customers --> german law (really i am not kidding, but it's only useful for my case (if you are not germans))
third mistake: no ToS on the date i registered (some screenshot as evidence)
fourth mistkae: no communication, no recover of the funds...
any court or any lawyer would confirm what i say.
wayback machine will be able to confirm that the ToS was not there on the day of registration as well.