Get your funds out immediately.
They are doing another scam.
They did an surprisingly non-scammy thing by actually managing to finish the UNY/DIG Swap a week ago.
Now if they fix the DIG withdrawals in a day or two, they can go have a 3-month, 12-month or 21 year holiday, I don't care.
That's exactly how they did with the XVG scam.
Blocked withdrawals and said they have a problem in the system.
After that, they disappeared for 2 months.
When they got back they announced they lost everything.
Good luck

I'm well aware about what happened with XVG on C-CEX. Horrible stuff, though their XVGCT refund program isn't the worst possible solution (maybe the 3rd or 4th worst?).
XVG however is a non ERC20 token, unlike DIG. ERC20 doesn't have privacy features for hiding, uhm,
accidentally lost stuff.
If C-CEX happened to accidentally loose their DIG wallet, that would mean that they lost their whole ETH-wallet, including numerous other tokens running on it. I hope that doesn't happen.