I got the required items for the first part of this quest. And looked at the items I received I then arranged them as it said and it gave me the key which it says to select, it then instructs you to go to st location so I followed this killed the spawned Mob and then looked at the quest thread. 

This tells me.to.take the first 2 items back to the quest giver.

Managed to get the quest to move on a little but it's asking me to take the key to XY location but I no longer have it. ...... I know I'll forfeit the quest and restart it....... NO it will not give up.the quest...I'll try from an alt... nothing showing back again to original char. Quest no longer listed .. YAY .. short lived YAY because when I try to restart the quest it starts from the same point. I can't get it to start for the beginning of this quest line

Can anyone help please.