i need help to continue a chain quest bug

Hello, first of all, my character is celewing from icecrown, I need help to continue the quest chain of the dragon graveyard map, specifically return of the high chief https://www.wowhead.com/wotlk/quest=...the-high-chief.
This quest is buggy, the npc doesn't appear and the place where I have to click to use the key is buggy and it doesn't let me click, even though it appears glowing it doesn't let me click.
I've already sent 2 tickets in the game and they haven't been resolved for me, I just sent the quest to bugtracker, which I already did.
What I'm asking is if there's any way that you can complete the bug quest for me to continue the quest chain, since I always complete the cultural master on the servers I play on.