Keep asking for payment

When I want to withdraw first they ask 10% fee after I paid they ask me to pay 12% tax, I paid. Then they ask another 10% for transfer fee to bank account, I paid. They ask another 15% fee for currency exchanges, after I paid I still can't withdraw my money because they said its suspect for money laundering they ask another 3000 to verify my account. I already paid half of total fund I have on mt account.