Keep saying that the system is under maintainence and unable to withdraw. It is suspect of induce fraud

I had withdraw once. When the second time to withdraw money, OPSON proposed to pay the exchange difference of 12008.23 USDT (payment in 2 installments). (My friend Mr. Huang offered to deposit 30,000 yuan to help me invest, which was deposited from his Binance account at that time). So when I applied for withdrawal, OPSON said that my account was suspected of money laundering. After I paid 30,000 USD, they would remit 30,000 USDT to Mr. Huang. Only then could my account with him be able to lift the account restriction and help me handle it. Withdraw money. Later, after paying 30,000 USDT (in 2 installments), they said they could start processing, but after a long time, they replied that the system maintenance would take 24 hours, the second time said 2 days, the third time said 1 week, and it has been delayed for a long time. Customer service has not responded. It is also suspected to be abduction and fraud, because Mr. Huang could not be contacted. Later, after paying 30,000 USDT (in 2 installments), they said they could start processing, but after a long time, they replied that the system maintenance would take 24 hours, the second time said 2 days, the third time said 1 week, and it has been delayed for a long time. Customer service has not responded. It is also suspected to be abduction and fraud, because Mr. Huang could not be contacted.