Demogorgon talked to me, however he didn't show his true form or fight.
I said to him "show yourself", then he said he is Demogorgon, but nothing happens, he didn't show his true form, I rest many time in the 6th level, but the dungeon is still empty, This is my 24th reload and I'm getting tired of waiting because I have'nt fight Balthazzar or Melissan yet. Is there a patch for this, please help.
Talk to Demogogron again. Choose different thread of conversation. Then you will be given options - either to read the Ritual Scroll which Odren gave to you, or go outside and talk to Odren. Then you'll be given more options - either to face and fight Demogogron(plenty of XP), or seal him inside(not so much xp).
Try reading the scroll anyway once conversation ends and see what happens. Then try talking to Demogorgon again if conversation does not auto-trigger.
Demogorgon doesn't appear until later, then you can have your fun. For now, you need to pass the phase where a scripted event needs to occur first and (I believe) reading the scroll should be a trigger. There should be two triggers in the conversation, but only if you choose the correct options.
-Spoiler
One should end in immediate combat, while the other will be forced on you if you choose to read the scroll anyway.