That's it its Either face them and let them taste the bitterness of their own medicine or keep silent and be attacked forever.
I would go for the keeping silent route because most trolls get high over the fact that people get worked up or triggered with their words, remember don't feed the trolls, you will lose in the end because they get their sense of self worth by triggering as much people as they possibly can.
Just ignore those people and focus on the game you play and work through your passions. Trolls will always be a trolls and there are paid trolls who work just to ruin someone's reputation. We know the legitimacy of Freebitcoin and we know this gambling site is one the most reputable gambling site, so if those trolls throws false accusations without any proof, just ignore them.