This is a test of commonsense. Complete the next sentence:

How to handle an irate customer on the phone
Do not react.
Keeping calm is key; reactions such as anxiousness or anger--while natural--will make things worse. If the customer views you as calm and professional, the customer will tend to " mirror " your reaction.
Try focusing on your breathing, by taking deep, calm breaths. Do not be obvious about breathing heavily, however--it may come across as creepy or sighing.