The bloke who insists on speaking to the manager because his expired coupon from 2019 "should still count" is the same one who'll leave a five-star review if you just nod and say "I'll see what I can do" while doing absolutely nothing. Learned that one during the Boxing Day rush at Meadowhall when Sarah from homeware nearly lost it over a toaster. Smile, nod, document everything — the security footage remembers what the customer forgets.