After the transaction, it has been unable to withdraw funds, the principal cannot be withdrawn

I opened a trading account with onepro. After the trading profit was more than 5,000 US dollars, the platform has not been withdrawn, and even the principal is unwilling to give me. I heard that this platform has withdrawn all sales in China, but continues to develop Chinese customers. It seems that they want to defraud Chinese customers of their money, and I want to expose them.