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Unable to withdraw money, frozen account

My trading account can only deposit money, not withdraw money! They want me to join VIP to withdraw money. Reward me $38888USD, transfer it to my trading account, and immediately ask me to pay $300000USD, I feel that this is a scam, and I don't have the funds, so I ask to withdraw and deduct $38888USD from my account! They disagreed and froze my account. I have communicated with customer service many times and asked me to transfer $38888USD from the bank. I think it is cheating. My trading account has enough balance to be deducted.