Even if she does reply, either the situation was NOT urgent, as she indicated, or she just doesn't care enough to take action. Everyone is busy so that excuse just does not fly. Her lack of communication is inexcusable unless she's had something catastrophic happen in her own family to cause this delay, which is doubtful. She's the type that, if you do rescue this kitten, she'll tell everyone how she rescued it. In the end though, the important thing is the safety of the kitten, if it even exists, but to keep you two running around in circles is cruel. It may sound unfeeling on my part but when I was actively involved in rescue, I'd make a couple of good attempts to contact people like this and, if I had no success, I moved on because there were too many others who were sincere in their efforts to help cats in distress. If this turns out to not be a hoax and you do manage to rescue this kitten, she'd get an earful that she'd never forget if I was involved. She needs a good slap!