Scam platform. Cannot withdraw funds

I was added to a stock group by a promoter, and then the group owner recommended us to invest in gold, saying it was profitable. At first, I didn't invest, but they shared how to make money in the group every day and even sent red pockets. They wanted everyone to invest in the gold he bought. Some people doubled their money in just one week. I opened an account and made a deposit, and I also made some profits. There was a man named Kunpeng in the group who claims there is an app for copying trades with just one click, saying that it could make money quickly. I hesitated, so I asked the promoter who brought me into the group. He said that Kunpeng's trades were safe and could earn more money. I was foolish enough to let Kunpeng trade for me. At first, I made some profits for a few days. On the evening of June 18th, I bought a heavy position. But the next day, I found that I couldn't close the position due to hedging. Then, the platform manager, Liu, kept asking me to make more deposits to avoid losses. To close the position, I kept raising money and depositing it. I deposited more than $70,000 that I was able to close the position. But then, I couldn't withdraw any funds. Liu, the manager, asked for an additional $50,000 to remove the risk of being hacked from multiple locations before I could withdraw. I had already invested so much capital and had no choice but to make another deposit. In the end, I still couldn't withdraw any funds. This scam platform has deceived many people that day.