If you are wanting the item that the game indicated you were initially going to receive, you could always download GD Stash, create it and import it into your game.
For every problem, there is a solution. Write that down.
I would suggest posting the issues you are having with GD Stash in the corresponding forum thread found here.
The mod author, Mamba is extremely helpful and is always willing to help community members such as yourself figure out how to get his mod working. His response times are also very good so you shouldn’t be waiting for a response for long.
Importing the Blueprint you want with GD Stash will solve your problem immediately. I just completed the Sacred Ashes quest for Kymon’s Chosen and was notified that I had received Savage as my Blueprint but there was a Juggernaut waiting for me in my inventory. With the help of GD Stash, 60 seconds later I had the correct Savage in my inventory and the Juggernaut deleted via GD Stash
There is a little bit of work to get GD Stash up and running, not alot, but you sound like me when I first started using it - you need a little bit of assistance.
Mamba will be happy to help where he can and trust me, once you started becoming familiar with GD Stash, you will be very happy you persisted.