Unable to withdraw

The account is unable to withdraw. I apply for withdrawal, but the platform send me an email saying that I need to apply for VIP withdrawal channel, so I apply for a 888 dollars with 15 days period. After that, I apply for withdrawal again. It said taht my account has a risk and ask me to pay 20% of the principle or operate the account for consecutive 15 days. I choose not to pay it and operate for 15 days. Then, my account is frozen when I just operate for one day. It ask me to pay again. It is clearly a fraud.