Passing on a report from MyFICO and from personal experience.
It looks like if you used your Sportsman's Guide Visa at Target recently, Comenity is automatically closing and reissuing cards. So...if you try to buy something today you will get a decline.
The online system shows the last 4 digits of the new number and Available Credit/Cash at $0.
Hopefully the new cards were shipped already...if not you'll get them soon enough.