I need to speak with your supervisor about your lackadaisical attitude

Specifically, if you have accrued extra charges because of your own actions (or inactionsnegligance as the case may be), I as a polite and knowledgable customer service rep should not be forced to endure your screaming, personal insults, beligerance (Im not getting off the phone until you reverse these charges), and implied or even explicitly stated attempts to.

In light of this, and the fact that no notice was given, how do I bring this across positively in a job interview. Junior High School.