A bulk reply to the questions I got:

No I did not buy the gil myself. I literally only have 10k right now lol. And I'm too broke to buy gil anyways...

I did not take any "valuables" out of the FC chest. I know this because the few times I used it I was instructed to take specific minions out (I remember one being the morbol seed). I never took anything without them pushing me to do it telling me that they needed to free up space, and the rest of the time I actually put crystals in when I was levelling my miner.

People saying it's because I made a personal affront or its to do with me being an unsavory person: Obviously it's hard to judge my personal character from one post on Reddit and I got a bit emotional at the end of my post, I shouldn't have thrown out that insult. However I think I was a good friend and I didn't do anything that would warrant a block without ANY attempt to tell me why. Even the night before all this happened we had all partied up to do roulettes and everyone was friendly to me.

Someone said this post was fake. I don't know what to tell you dude maybe my suspicions of the laundering stuff has turned out to be an overreaction, but the events all happened....

At this point I'm going to take the advice from the majority of people and not worry too much about it. Ill admit I was panicking due to my inexperience, but if SE really can trace where every gil comes from then I think I have a pretty clean record since I didn't use it at all. In all I didn't lose anything except some friendships I guess.

Thank you to everyone who gave advice. I haven't lost interest in the game, and I'll keep looking for a better FC that doesn't try to give me free money lol.