I went in peacocks for a some baby clothes a few years ago.
I'd forgot my purse and only had £40 in cash and but no cards (so I was very careful about what I picked, and added up how much it all cost).
I got some bits including some off a sale rack and made sure everything I had came to no more than £40.
At the till a set I'd picked up scanned at more than double what the sale sticker said (meaning id be well over my £40).
I pointed this error out and the woman shrugged and said "well it's not a sale item".
I said it has a sale sticker on and I got it from the rail containing all sale items. 
She said i should feel lucky she's not calling security as it's attempted theft to put sale stickers on non sale items 


I asked to speak to her manager and insisted they viewed cctv because I didn't appreciate being accused of theft.
They gave me the product at the sticker price plus a gift voucher by way of apology.
I wouldn't have minded at all if she said it wasn't scanning at that price, must be a mistake, sorry, etc. But she was fucking rude and accused me of that! I was heavily pregnant and had a pile of items, I clearly wasn't trying to pull a fast one over a few quid!