Isn't this your case at casinoguru? -- https://casino.guru/stake-casino-player-s-account-has-been-closed-3

If that is you, then there is some inconsistency, especially regarding the disputed amount. Is it really 5K as you said here, or $6K as you mentioned in the casinoguru complaint?
I have a feeling they blocked you because a certain other casino/ game provider already blacklisted you for abuse or something similar to that, but let's wait for the outcome.