Problems with the customer…

Me: “Hi, how can I help you?”
Customer: “I need to return this d*** camera.”
Me: “Sure, was it not working?”
Customer: “I just don’t want it, okay?”
Me: “Okay. Have you opened the box yet?”
Customer: “Why does that matter?”
Me: “Well, as the sticker on the box says, if the box is opened and you return it, I have to charge you a restocking fee.”
Customer: “Oh. No… no, it hasn’t been opened.”
(I look and the box has been clearly opened, with a torn seal.)
Me: “Uh… are you sure it hasn’t been opened?”
Customer: ”LOOK! ARE YOU CALLING ME A F***ING LIAR? Where is your manager? I spend hundreds of thousands of dollars here and this is how I’m treated?!”
Me: “Ma’am, if you just–”
Customer: “THESE PEOPLE CALL CUSTOMERS LIARS! DON’T SHOP HERE!”
Me: “Ma’am, I believe you! I will return it!”
Customer: “That’s right you will!”
Me: “Can I see your receipt?”
Customer: “It’s in the box.”