You can't really do anything but wait mate even though this is quite weird in my opinion.
Maybe they have huge amount of deposits and withdrawals because of this Bitcoin run. I know that this is nerve wrecking, especially if you want to sell and price is dropping, but all you can do is wait. I am secure deposit will show up soon enough.
Mine deposit was also get delayed today but that is very small amount compared to yours. After half hour also it doesn't get credited but later i found blockchain is taking lots of time for confirmation. Bitfinex is totally fine for me now, hope you have also got your coin deposited.
Why are you guys even replying to this thread, OP has confirmed that he got his deposit, although after a slight delay.
Last post edit was 3hrs before ~Bitcoin~'s post and 6hrs before Mickey's post.