Thing is: this company receives a complaint, if it's related to package it has two possible source: logístic or production, this two departments crate separately investigation about the path that batch took, if they don't find any problem at this path they just don't want to perform a 8D, cause they understand that in the production parameters there wasn't any issue and during the from the logistic side, they say that in the logistic path for that batch, any issue happen that "could be verified"and they also don't want to sit down to start root cause analysis.Short of commiseration, there's nothing anyone here can do to help the OP. The problem is most likely at least two levels above his, and changing the culture can happen only if the person at the top demands it. Many executive horses have been led to cool, clean water and then died of thirst while ignoring it.