mastadon and medallion bug

I killed mastadon 8 times before I had to group with someone who had the quest to get it to drop for me.

I finally got the tusk but after entering the right side medallion from keth I have been farming bone pits for over an hour when I was told the drop for the medallion should be instant now.

I believe my questline is bugged and need you to either reset my medallion quest or just give me the left side of the medallion. I am already way over leveled for my area and am tired of sitting in bone pits killing the same things over and over.


PLEEEEEEASE help me!!!!!