Unable to withdraw in bitcoin trading

A broker on MT5 called btcmachine was still online. Please help me withdraw. There were more than 10,000 users who were scammed. I deposited $10,000 and gained $10,000, so my balance totalled $20,000 as the screenshot showed. I withdrew on August 2, and it said they were off work at 16:00. On August 3, I was told that the system was maintained. On August 4, it asked for a minimum of $50,000 to withdraw according to the contact. These were scams. Please help me! My account was cleared and reset again and again. The webpage was unstable.