I never did that quest, so i can speak a little more freely perhaps, without violating the spoiler rule?
First, Bamko would tell his "owner" to check the chat logs, verify EXACTLY what was said. it is very common to get a quest, think you know what you need to do, take notes on that in quest log, and thus be stuck. Chat logs should help you out greatly for that.
If that didn't work, Bamko might ask a few people Ingame IC.. "pardon me, Reffitia asked me to cut this meat up for her, but now she seems annoyed and won't even tell me what I am doing wrong... perchance you can see what I am doing wrong?"
then, if chatlogs and IC help does not work, I would contact a GM, I believe Rizin still handles fixing quest issues, but we should always try to make a good faith effort to remedy it ourselves BEFORE we contact her, IMO. (She is really helpful, but I shudder to think how many spam requests for help she must recieve.... but if quest log tells you that you are doing exactly wha is asked, I guess it is appropriate then...
Hope that helps.