Hey bud, simply don't chase shadows, it's all gambling and in gambling, you have two chances, and they are...
1- You win - congratulations.
2- You lose - accept it, move on and try again later (if you can and want).

Taking legal actions because you bought fun tokens for freebitco's free spin makes no sense, specially when freebitco has not stolen your fun tokens.
If your only purpose for buying the fun tokens were to get free spins from the casino, and right now, the free spins are no longer forth coming, simply withdraw your fun tokens and sell(dump) it, the current price of the token is not even a factor to consider at all since it's a general thing that all crypto prices are volatile except for stable coins, it's a risk you gladly accepted to take when you decided to buy the tokens, lock on freebitco for free spins, you can't win any case with such if you take legal action against the casino.

Just my thought.