Bought an item yesterday for £9:99, paid tenner cash, then found it was surplus to requirement today. No problem I thought, package not opened in any way, receipt in pocket, good to go. As luck would have it, the same chap that served me yesterday was on the till. Presented the item and receipt told him it wasn’t needed. No problem he said, tapping keys on the till. Here’s the extra penny, I said, placing it on the counter. Don’t need that he says, I’ll give you the exact money. It will be the exact money, I say, in fact, you can give me that exact same ten pound note that I paid with if you like. Nope, can’t do that, I have to give you £9 and 99p. Ok I said, you do that, then I’ll add this penny to my refund and ask you to swap it for a tenner. Nope, not allowed to do that he says. Rapidly losing the ability to remain polite, I ask if I can speak to his colleague to confirm what he has said. No problem at all she says, instructing him to give me a tenner. Ok sir, I just need your name, address, postcode, national insurance number, passport, driving license, utility bill proof of payment, shoe size, dental records, letter of recognition from your GP, birth certificate, decree nisi, you get the picture. They don’t ask for any extras when you buy with cash, so imo the valid receipt from the day before is sufficient. Told him my name, and said you’re getting nothing else. Couldn’t reimburse me, but colleague could, and did. At least there was one realist on duty then. Why so difficult?