Anyways, they are demanding kyc and I refuse so they will close my account
There will be no solution to your issue as you have denied the KYC verification process. As a Curacao licensed casino and based on the terms, LuckyBlock has the right to ask you to complete the identity verification process. Why you have refused to send your documents to them? They haven't stolen your funds yet. Try to complete the KYC verification and see what they do with your withdrawal.
This is now the only thing he can try to get his funds, if he do not want to do it then he should say good bye to his funds.
I'm not familiar with this casino, I'm sure it is the first time I heard luckyblock as I cant find a thread about this casino in this forum.
He said that he had no issue for almost a year, means that he should have made many deposits and withdrawals during that time frame and logically he should have known about the rules and terms of the casino well.
However, it is just a story with no real evidence, he should provide valid evidences to support his claim.