Unable to withdrawal.

I paid $436,650 to operate the platform, and I have $740,000 in my account.If I request a withdrawal of $400,000 of that amount, I will be charged an additional $62,000 in taxes and operating fees, and if I pay that, I can withdraw the money within 48 hours. I paid when I was told that I could, but I can't withdraw money. When I inquired, I was told that I would not be able to withdraw money immediately unless I paid an additional $220,000. Even if I keep my promise, they still charge me more and won't pay.