This is a personal experience post.
I had one of my strategic PPC terms disallowed by Yahoo's Global Quality Control - seems they are an independent force inside Yahoo - and was having a hard time getting things brought back to status quo.
Enter the new and improved Yahoo Customer Service people. My Diamond ad rep was on vacation, as were, it seemed, everyone who could possibly help me. So somewhat frustrated but resigned I left a couple of messages about the situation and figured I would be waiting a couple of days before things started to move.
Well I was wrong. I actually received a call from my guy from his vacation and he tapped a couple of people in the company to make sure I was helped. Ultimately the term was reinstated in under 12 hours.
Now I am impressed. Keep up the great work!