Once they are pulled for Scrolling Gallery update, they won't reappear until eBay is done with them (their delay for Trust & Safety check).
Cancelling the Auctiva account won't bring them back any quicker (especially on peak-time Sunday evening), and I don't know how it would effect the integrated Scrolling Gallery for the Store on the 100+ listings, i.e. not sure how they'd function with a cancelled account.
Danno