How to do with the unavailable withdrawal in Luojia Investment? Freak out by the lowdown on it!

I knew this platform accidentally. Though I have never traded before, I did made some money by trading stock with the help of the master. With his promise that I could make profits, even multiple within one week, so I said yes. He urged me to open an account as soon as possible. Having considered overnight, I opened an account and deposited a half of my savings these years, 340000 RMB, into the account. However, with the master’s several guidance,I made huge loss. He tried to comfort me and promised to earn my money back double. But I made a constant losses of 290,000 RMB within a week.The master didn’t give me a reasonable explanation but urged me to add fund to earn my losses back,which made me disilluded totally.Having refused to add more and stopped the trade, I was removed out of the group immediately. I tried to contact the master, got no reply, and was deleted and blacklisted by him later.