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"What's your name or ID number?"
Why: Shows you're holding the rep to account and may call again ... and again ...
"You're so helpful. How can I let your boss know?"
Why: This makes him want to help you, says Scott Broetzmann, CEO of customer-service consultancy CCMC.
"I hope I don't have to post my song about your poor service on YouTube."
Why: Complaints on social media can easily go viral. (Go to youtube.com and search for "United Breaks Guitars." It's been viewed more than 8 million times and caused a barrage of damaging PR.)
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