I did all the main quest and killed Duriel in act 2. I took a tp to town before talking to Tyriel.
I could not go back through the tp and talk to him. I exited the game and entered again.
Now all my quest stands as completed, but I can’t go to act 3. I can’t get the staff again since the quest items will not drop. So now I’am stuck in act 2, with no means of progressing.
Can you please reset the quest or help me some other way.
You shouldn’t need the Staff again. The entrance to Duriel’s Chamber should still be open. You will have to fight your way back there and kill Duriel again. But, Tyrael’s Portal may still be there. (It’s worth a try).