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So you need to provide KYC in order to withdraw?
Centralized casino always request for KYC to be able to make withdrawals, between that also as a gambler if you don't want to have any issues on the casino you have to put in place some measures to prevent possible issues along the line, so as far as you set out to gamble, you have ready yourself to KYC and you should try as much as possible to go through all KYC so as not to have any issues when you hit the highest multipliers and want to withdraw your jackpot winning just like in your case.
KYC is usually required for withdrawals especially if you have won a large sum of money or if the casino authorities want to verify your transactions, then without KYC your money can get stuck. Therefore if you want to avoid any problems at the casino as a gambler it is wise to be prepared for the KYC process. In most countries online gambling establishments have to comply with the regulations of certain regulatory bodies this also ensures the security of your own account. By verifying your identity the casino ensures that the money is going to the right person KYC is an essential part of a casino's operation and is essential if you want to withdraw your jackpot winnings safely and easily.