Big sign -30 pack diet coke for £10 with nectar. At checkout came up as £14.75. Advised that was wrong and I didn't want to pay that. Item removed. No offer to check the price. I went back to display to check I had read the price correctly. I had. Told another member of staff. I was told to tell customer services. No offer by them to sort out the right price so I could purchase item. As there was no queue at customer service I decided to mention it, got a blank look and no offer to sort it out so I could purchase item at displayed price. Sale lost. My thanks goes to the one member of staff who helped. The man who lifted the diet coke pack off the display for me.