This exchange does not allow me to withdraw

I contacted customer service and they asked me to pay a tax fee called personal income tax on profits up to more than $15,000 and must be paid once before withdrawing. This is very unreasonable because according to my understanding, the law in Vietnam does not allow forex brokers to operate and also does not manage tax collection of self-traders in the territory of Vietnam. Moreover, when the business is profitable, the law of Vietnam stipulates that there are two forms of tax payment: the user declares and pays tax to the tax agency when there is a profit or will deduct personal income tax. right on the profit that the user makes a withdrawal. Thus, the BKYHYO platform asking me to transfer 10% of personal income tax on profit is completely unreasonable, not by the provisions of Vietnamese law and there is no guarantee that after I transfer If the tax is paid, the platform will transfer all the principal and profits to me. I see this platform has very clear signs of fraud!!!