Universe-Markets.com Review

I have had a managed broker account with this London based Company. Initially, I received a modest return,with my Investment. Then I was encouraged to Invest a substantial amount of money in Xiaomi's shares . I did this, and after some months when the shares were sold and the funds put into my Trading Account, I was able to request a pay out. When I did request my funds, I was informed that the HMRevenue were holding the money and I had to pay Corporate Tax on the profit . But the Tax had to be paid to Universe Markets and not directly to the tax Dept. Universe Markets will not supply me any documents or information to prove that the funds are held by HMR nor will they allow me to deal directly with HMR. They have blocked my account and will not respond to any of my communication. My Bank believe that the whole operation is a scam and now I fear the same. I have lost a huge amount of money. So far, I have reported to Action Fraud but am awaiting a reply.