Only at the beginning, I was relieved according to the withdrawal application, but when the balance increased, it was suddenly frozen without notice.

I first deposited $1000 and started trading on MT5. $94 first profit. After that, I withdrew $500 after profiting around $240 twice. Since it was my first time withdrawing, I made a withdrawal with the intention of confirming the increase in funds if I could withdraw. Because it was my first time, I was able to pull it out easily. The money was deposited into the specified bank account. I was able to confirm that I could withdraw, so I increased the amount by $6,000. After three weeks of trading, my balance exceeded $30,000. Then I applied for withdrawal of $650. I couldn't withdraw money because my account was abnormal. It was a reason why I couldn't convince myself that it was useless because the number of transactions was small. After 3 days, it was frozen and told me to pay 3 million yen as a security deposit. I didn't think that it would be frozen in about a month from the transaction, so I'm worried about being scammed. Right now, it's frozen, so I can't trade or withdraw, and I don't have any money. Help me.