defeat kuninasha

i defeat kuninasha and the quest continues telling me "defeat kuninasha" maybe the problem was that i killed it with my summon(im cleric lvl 53). the thin is... now im in the gate (outside) yeah i use the return skill, and cant go inside again... Can i never finish this quest?
and, other question... i cant do the quest to entry the abyss.. it say "you need to complete the quest following through first" but i cant unlock this chain of quests (honing your skills - abyss general knowledge - following through - the last check point)
why this happens ?

PD: sorry for my bad english x)

 

Had same problem too, also played clerick (lvl 48 I belive) but killed it w/o the summon.
Couldnt get back in, didnt report/ask cuz wasnt member of forum back then inched:

For the other question, you can go abbys after you hit 25 without doing the quest.
This night there will be a major update to we need to see if the quest gonna be repaired.