Blizzard, you are useless! None of the fixes you have mentioned for this issue work. When are you going to fix it???
Hey Xena,
Looks like you took a wrong turn somewhere and got lost in the maze of Blizzard’s forums… and ended up here.
This forum is for technical support on Blizzard’s Classic Games — legacy games such as Warcraft III: Reign of Chaos and Diablo II (2000). This is the wrong place for issues on World of Warcraft (any version of WoW).
WoW has its own forums here: https://eu.forums.blizzard.com/en/wow/
The WoW Bug Report forum is located on the America region, but you can also submit a bug report through the in-game menuing system… for details, see the following Support article https://eu.battle.net/support/en/article/15043 and select “World of Warcraft” in the dropdown box.
Best of luck with this !
(I did a few searches with Google — to figure out what game this was for 
— there are quite a few posts about this issue already; it looks as if this quest has been bugged for a few weeks).