I've killed the nine-tail fox a bunch of times and taken the Old Fox's Tail back to Chil Sung, but it doesn't register the quest as being complete. I have tried forfeiting the quest and redoing it, chose both options with the 'familiar woman' when leaving the area, nothing seems to work. After killing the Nine-Tail Fox and picking up the tail the quest box pops up saying complete, but Chil Sung is having none of it. Any advise welcome!
