This month I called them to ask about lowering my normal rate, and they gave me another number/time to call for that, but before they asked if I'd like to get a 0% balance transfer.
wtf? the girl on the phone said those offers come up randomly at the end of the call, she couldn't explain why they wouldn't just give me one when I needed it two months ago.
So apparently if you want to transfer a balance at no interest and can't find one of the junk mail offers they've sent you, DON'T call and ask for a balance transfer. Call and ask for something else random, and hope that you get one on the Wheel Of Offers that comes up at the end of the call.