Two days worth of work, trashed

I took a prophecy from CoF. Kill Lagon 8x on 12+ corruption = 6 Weavers Will Chest Pieces. Worked my corruption up to 17. Ran the Monolith 50+ times to kill Lagon 8x. Watched my tracker progress after every kill. Super excited on 8th kill, only to find that not only did I not get any weaver will items, nor chest pieces. I got shit. Nothing for two days worth of focused work. So disappointing and infuriating.

Very bad feeling. Was having a blast… super excited to come home from work and grind out my last two kills and grab a much needed chest. TWO DAYS worth of grinding to get my corruption to 12+, then 50-75 monolith runs to be able to even fight Lagon, and several times on death to actually get the kill. Knew I had two kills left today when I got home from work, super excited that I was going to get that reward 6x Weavers Will chests… nothing.
Just makes me want to go play something else. So bad, and no reply to my concern.