You will be surprised how a "Hello, how are you doing?" before the conversation goes a long way.
Story time:
When my Xbox 360 broke down (3 Red Rings bullshit), I recount it being the 6th time it broke down. I had the extended warranty on the Xbox 360 through Microsoft. However, it had lapsed. I greeted the customer service representative. She said she was going to look stuff up. She took 3-5 minutes at most. I told her my Xbox 360 broke down again, but my warranty expired. She took care of the situation. I don't know what she did, but at the end of the call I felt relieved (as if I knew it was all going to be well.) I got a confirmation number and a shipped date of my new Xbox 360 console. I immediately thanked her and asked to speak to her supervisor. I explained I wanted to leave customer feedback for the High Quality Service I received. We parted ways. I talked to her supervisor. I told him about the great customer service and how it was beyond my expectations. A few days alter Xbox 360 received. I even got a call from the same representative following a few days to make sure I received my console.
Take my advice with a grain of salt. However, I believe in what you put out into the world is what you get in return.
To clarify, I don't mean you're being a jerk, asshole, or mean to your representative. What I mean, just try your best to be understanding of the other person of the other line. Shit happens. Sometimes things are not in your control. But the things that are, do your dam best to make something good from them.