I figured it out. The issue, in my case, was that I joind fire treams through this app. There were times where the team I had joined were already at the final quest of that specific mission. Basically I skipped some quests and talking to vendors because of this. I did get the "The Witch Queen-Legendary" Triumph since I finished the last quest of all mission on legendary. The way I got my gear is by going through the entire campaign again and this time actually talk to the vendors etc. YOU CAN REDO IT ON NORMAL!!