Looks like user wallets are gone in the back office. The packages are still listed, but there is no access to the wallet anymore. I had two pending withdrawals as well. Gone.
I’m glad I withdrew as much as I could while I could. Everything else is gone. I didn’t lose anything, but I feel bad for those who did.
Update 01/16/18
Logged back into USI, and it says balances will be restored within 48 hours. Still no clarity as to what's going on.