As happens in this house, an online order was placed, and it was delivered with the usual substituted item and not found item. This time, however, they managed a cock up in the form of apparently replacing one pack of toothpaste with one ladies deodorant, but charging for the former. So I phoned up, spent a couple of minutes listening to them advertise Asparagus, and then got put through to a nice lady on the other end who kept saying "Good mornin--, sorry, good evening".
After getting part the usual game of guess-the-phone-number-used (turned out to be Nick's old one - one we realised this he got her to update it on the system), I then outlined my problem.
To which the response was, roughly, "I'm sorry, I have no idea how that could have happened. >clickety-click< well, you can keep the deodorant and use it yourself or give it away or whatever, and I'll refund you the cost of the toothpaste which is £1.67 so I'll round that up to £2, and that'll be applied as a voucher on your next order"
I'm actually impressed at this outcome. Nice one, Sainsbury's.