The XTIUSD wasn't so low when you opened your position, look at charts attached below. I suggest you to study more charts from other brokers, also ask friends or other people on this forum (which are also ICM clients) for their XTIUSD charts, and compare with yours.
So the question you should address to ICMarkets, are these:
1) Why they faked the price with that crazy down candle (look at your previously attached chart and compare with the ones I attached) ?
2) Why they allowed you to open a position quoted with a fake price ? You sold at 6.65, XTIUSD didn't reached that low price at the time when your position was open, it even didn't reach it later, the lowest price in that day and after was 9.93. Then it raised up.
3) Why they closed the FAKE position with a REAL loss?
So they offer fake prices and fake trades, but acquire real losses from clients? This was insane price manipulation.