The Great Customer Service Blunder

Yesterday at work, things didn't go as planned. I was helping a customer who was already frustrated about a product issue. Instead of offering support like I should have, my patience started to wear thin... My tone wasn't kind and I might've even rolled my eyes. Afterward, the customer called to complain, and then the manager gave me an earful. It felt awful at the time, but now that it's over, I'm feeling relieved that I learned from this experience.