How many of you have customer service jobs and what is that like?

I was a customer service rep for a catalogue many years ago. Catalog shoppers would cal l up to place an order for delivery. For the most part it was ok, but there were many days where you had to be VERY patient and kind, to really MEAN callers. They would complain about an item that was chipped in the mail, as if YOU did it , or they would say I need a refund rudely, or complain about other things too. I am patient by nature but man, sometimes I wanted to yell, Why do you think it's ok to be this way to a helping representative? But I just was kind instead. I really can't say I loved the job. It did get tedious after nearly a year there and I went to a different job.