Admin told me today that there is an investigation about the plinko game, so i have to wait
So the reason for your KYC verification is not the huge balance in your account but rather they are investigating if the Plinko that you use to play and won huge amount might have an error by the time you use it? This ill surely take some time because investigation like this is very sensitive to give a fair result.
How much money does your account balance still have? Is the money that you won on Plinko is still there are you already withdrew it previously before this KYC verification to your account?
I had withdraw 88 mbtc which was instant, later withdraw 88 mbtc again which is still pending and had left 267 mbtc on my acc before KYC setup