Can't hand in quest Thunderfury

Hey all not sure if this is the right spot but support told me to post on the forms.

I recently got the final item needed for Thunderfury, and went to hand in the quest and the complete quest button is greyed out. I went to the bank to see if the components were in there but I can’t find one of the bindings and the essence in my inventory or bank.

Idk if they vanished when the quest items merged into the quest log or something. BUT the issue remains is the quest log shows i have all the items. My understanding is if the quest log shows you have an item then it will not drop.

I have been grinding this for 12 years on and off and I have no idea what to do. Please help