Marc, try Gary Leff if all else fails in your own attempts. That's what I did when I couldn't get anything through USAir after many calls! Worth the cost, if he can find something, but even he says Delta is the biggest challenge of all.
I'm glad to hear you are going to visit Krakow. My Joanna and her husband just spent a weekend there last weekend, as they are trying to get in as much travel before moving back from GB soon.
