"The customer is always right..."

[The Unconquered Sun]

A few years ago I was standing in line at the customer service counter and the woman in front of me was loud enough for me to hear. 
"I saw this same product at another store for a lower price."
the woman behind the replied "Yes ma'am, however we don't do price matching at our store."
"and I saw another product at a differant store for a lower price."
"yes ma'am, unfortunately we don't do price matching at this location"
and the lady customer started to lose it at this point. "Well I don't know why I should stay here when I could save money somewhere else."
and the lady behind the counter said "I understand you frustration, however it goes against our company's policies."
the lady stormed off but a little bit later I saw her still shopping at that store.

[Captain Stud Muffin (BLM)]

Thank god retail was never my thing but even with accounting you can switch the word customer for Client. It's a pain having to break shit down sometimes because people do not like to listen and when it comes to dollars and cents it's crazy.

[Blindkarevik]

Customer (on phone): Hi, I got a pre-paid phone from you guys a little while ago. I can't find my phone number on it.
Me: Have you activated it?
Customer: Yes.
Me: Oh, well.. depending on the phone, you can go to settings, then there will be an option that says "Phone information" or "Call Settings" and it will be in there along with your carrier, and information about the phone itself.
Customer: ..... yeah I'm seeing a lot of stuff, but I'm not seeing my phone number. Is there an easier way to find it?
Me: Well, I guess the easiest way would be to call someone in the same room as you and they'll tell you what number pops up.
Customer: Well this phone doesn't call out.
Me: ..... have you activated it?
Customer: No.
Me: (having an aneurysm) You have to activate it before you get your phone number.
Customer: That's dumb, why?
Me: .... so they know where you are and can assign you a local number.
Customer: Oh okay, thank you! *hangs up*

... almost drove me to drink.

[BarmPot]

Once at my old job I was called the C word because we ran out of a certain drink.

A van was parked outside and a woman entered the store. I greeted her, made small talk, etc. She had a look around then asked if we had any WKD Blue (alcopop) but I told her that unfortunately none came on our previous delivery. She was fine with it, left the store about a minute later. She went to the van, then the guy got out and came in-store. He asked if we had any WKD Blue, I apologised and said no, he called me that.

My store manager was in the store at the time buying stuff for a party and she was completely shocked. I just kinda shrugged my shoulders and carried on with what I was doing. My manager was like "How did you not say anything back?!" but I legit didn't care at all haha.

We had plenty of nice customers though, I'd say 1 out of 100 are like the guy above, but even then not that over the top.