Question: how you deal with an irate user or customer who refuses to calm down?
Answer: Don't Take It Personally. Although angry customers take their frustration out on you, they know that you did not cause their problem. ... 
Never Argue Back. ... 
Kill Them with Kindness. ... 
Be Patient. ... 
Know How to Apologize. ... 
Solve the Problem. ... 
Relieve Your Stress.