Unable to log in PROFIT

I knew before that there was a problem with this platform. I traded with a small amount of money for fun. It was good for trading before. However, I suddenly unable to log in the platform today, and the system always notify me the system being busy. I have opened crude position in it. And there are almost more than 400 US dollars in it. I am so worried. The customer service personnel are offline. What should I do!