PubIt! says it can take up to 72 hours (3 days) for an ebook to go "live". Others have reported that it took a week or more. We're not sure why there is such a disparity.
I upload only validated, tested, ready-to-publish epub files for each of my ebooks. They require no conversion by PubIt! and only need to be approved and then encrypted with DRM. Mine seem to take about a day and a half (36 hours) but I haven't uploaded any this month and timing may be related.
Many folks have come here to either vent or look for help. Unfortunately, this is a user-run forum and we're in the same boat as you. We don't have the answers about the problems that PubIt! appears to be having. All we can advise is to have patience and keep sending emails to PubIt! about the problems.
Kind regards, David