I discovered the stronghold while adventuring, and when i got to the giant it had already killed Ugor. The gate was open, but inside nobody would talk to me, because i wasn't a blood-kin. I tried to take the Forgemaster's Fingers quest from the Chief, but it bugged and the quest never started. Finally, i got blood-kin status from another quest, and now they treat me well, but i can't find Atub so i can start the daedric quest. I tried talking to Riften guards to hear the rumor about the orcs, but i heard nothing about them. Tried getting the rumor via console, but the quest marker led me to the Chief, who had no dialogue option regarding the quest.

Is there any way to fix this? I'm trying to get the Oblivion Walker achievement, and Volendrung is the only artifact left. Thanks for reading this.