What the worst customer service you've had?
I don't have anything too terrible to say. But one time I was in a comic book shop and there was a magazine in there that I was interested in but I didn't buy it on the day since it was pretty pricey and I didn't have the money. Anyway, I went back a few days later to get it but it was gone. I asked one of the staff if they happened to have anymore in stock and she said;
"No, that was the only one. That's what we do in a shop, you see. WE SELL STUFF...
Perhaps she was trying to be funny, but it just came across as really rude and patronizing. Anyway...I didn't shop there again.
I've worked in retail before so I understand that customers can be annoying and you may get fed up but you shouldn't take that type of tone.