Seems have misunderstanding with justbit.io KYC procedure, there are not required with KYC for deposit only and you need KYC for withdrawing, check back with Justbit.io policy about withdrawing fund on second points there are clearly explain about the rule for withdrawing,
"To withdraw funds from the account, the User is required to complete identity verification through KYC procedure at his User’s Account".
You can upload your ID and back later after KYC approving then try to withdraw will process or not, if have problem after success KYC but not ability for withdrawing you can back later here and complaint about Justbit.io policy.
https://justbit.io/pl/policy/payment/They stated that KYC is required according to the piece of text and link you provided, yet if you initiate a session with their live chat it will confirm that you don't need kyc meanwhile they're requesting for kyc and that's what is confusing us and also the reason why Op is mad at the casino, it's more like they baited him.
Yes, and as a gambler who don't want to pass KYC and just play on casinos. However, it there is some confusion and it seems that it's very misleading for them, then I don't know, I might not trust that casino.
The problem is that when you have a good winnings and wanted to withdraw that and you can't because the casino without your knowledge, will ask for a KYC. So going to be a dilemma whether we want to pass KYC or not and let that winnings like just being confiscated by them.