I'm going to disagree with half of the thread on one point - taking good photos while trying to navigate this clusterfuck is going to be extremely difficult, this kind of baffling shit would have anyone off their game. They didn't do their part, on any front. Your images probably aren't acceptable quality but if you're in any way involved in sorting out personnel issues or supply issues for the things they're supposed to be providing things have gone terminally sideways anyway.
In your shoes I'd offer to schedule a reshoot at a discount - depending on how good they've been in the past, potentially comped - with the note to them that the organization needs to be WAY better for the second round. I'd consider working on your scheduling and setting expectations more than fretting over the quality of work; if it's big enough that you're scheduling an hour of setup, it's probably more than an hour of session time. If it's an hour of session time that a commercial client is a third of the window late for, the discussion should probably be on a serious discussion of extending the billed time or rescheduling because that's just kinda wild to me.
The bit about the reluctant model is enough to make me think that the company needs a good hard whack on the subject of professionalism and what preparing for a photo shoot actually means because that is *so* not your job to deal with, either. They shouldn't be forcing someone into a photo shoot that they don't want to be a part of.
Let me help here;