shipping plants - is hard on plants - especially adenium, because it takes them a long time to recover from most everything .... the good news: adenium are resilient - if given the time
the leaves dropping off is expected - in a dark box a few days will do it ...same with the aborted flowers and buds
skip pruning unless a limb / stem snapped or broke off
give it a few days before doing anything ...
then water to saturation
then outside w/ part sun a few days ...then move into as much sun as possible