As much as I would love to trash Bittrex, they did nothing wrong in this case as stated above. Pretty much every news outlet covered the whole situation around the theft, and the fact that Bittrex was going to delist that coin. Even BTG openly said that Bittrex would delist their coin.
Read through this thread, it includes a screenshot of Bittrex stating BTG will be delisted;
https://bitcointalk.org/index.php?topic=4995050.0Take this as a lesson and never use exchanges to store your funds again.
And if you do anyway, which applies to plenty of people, because they don't seem to care,
don't disappear without regularly checking back what's going on.