Money is unable to withdraw in HLI after losses

I happened to knew an adviser in a stock analysis group. Afterwards, He added me into another stock group. At first, since he gave us a good analysis on stock quotations, I spent my leisure time in the group for learning more. Then the adviser asked me to do him a favor by voting for him since he participated in a popularity contest. After the contest, the adviser often sent me messages, saying that it is difficult for retail invests to gain profits from the stock market and asking me to trade with him. He claimed making money in the current market to be easy and to have set a trading group. As soon as entering the group, I was attracted by their ways of earning money. I knew little about these ways before, and I thought him to be trustworthy since I did gain profits with his help. As a veteran in stock market, I hesitated to trade with them. But the adviser suggested me to deposit 500,000 and give a try, and further comforted me by high profits within a week. I hesitated but he urged me to open account saying that he could help me gain profits afternoon and sharing the contact information of HLI’s customer service personnel. Given that, I opened an account on May 13th after one-night consideration and deposited most of my savings. On May 20th , I followed the adviser, who gave us recommendations in the group, and made 10 more lots. In the end, I lost 300,000. I followed his advice several times, and suffered great losses, with 5000 more left. My confidence was deeply defeated by the continuous losses. I was beaten down to the ground.