Have you asked them for an explanation? I would be very interested in their response because they have made a point of being "very busy". I believe that Google went after the most voluble, the most visible and the most obviously corrupt and that some decent folk got caught in cross fire. I also believe that's its no more than a warning and if the directories survive you may eventually recoup the true value of the link you bought in fifty years time. Why did you buy the link? Was it PR, traffic or the fact that they were perceived to be an authority sites? Where do you stand now?