I am liquidated after tradingh. I trade eurusd on July 27th, and it falls to 0.848 in a seconde

I did not operate once for two days after I depositing 8000, and the customer service staff refused to withdraw when I wanted to do it. They told me that it requires 5 minutes after 5 lots to withdraw. So I bought EURUSD 0.5, which fell once I bought, but it is just 20 dollars, and then it fell to 0.848 ten minutes later and liquidate my position directly. In 20 years, it has never reached 0.848. Why did it drop suddenly, but it never reached 0.084 that day? This frad platform does not want me to withdraw