I used Sainsbury’s for a long time but daughter does it now, decided to do a shop last Christmas with a voucher I had, worked it out to almost the last penny but then delivery day I had a message it had been declined, got onto Sainsbury’s to ask why and was told one of the substitute items made it go over by a penny, asked if they could take that item off, no couldn’t do that as it was now packed so asked if I could pay the penny on another card, no, can’t mix payment methods so in the end I had to use my debit card to pay for all of the order so be careful with substitutes and if you don’t want them, tick the box to say that