just noticed this thread was waiting for it....
tried making a large purchase last Sunday April 27, charge denied, called in CS they told me need to call special department that's open Monday, called in Monday morning they verified charge and told me blockage is off tried making charge again and declined again,
when i called in they told me all my citi cards are closed, "personal and business"
reason: alot of my cards are maxed or almost maxed out (which was true)
FYI: didn't do refundables or any other shtick simply for using allot of my credit in multiple cards