Meta-Cap kept asking me for money after leveraged trades went wrong

People presenting themselves as Meta-Cap representatives helped me make high-frequency arbitrage trades through the HTC platform. After some apparent successful trades, I was directed into cryptocurrency positions that went badly wrong.

I was told that mistakes involving the traded units required me to provide additional cash to hedge losses and continue. The account then showed major losses and daily swap-interest charges on alleged leveraged debt. I was repeatedly asked for more money, even after the balance had been wiped out.