I have an interview at a call centre and have never worked in a call centre environment before, but I do have customer service experience. In my pre-interview, I was asked "Please describe a situation where a customer was very upset and how you helped fix it" at my current job, I don't usually get in arguements with customers so I had no idea how to answer it... does anyone have a good example i can use?

Thank you in advance! 10 points to best answer!