For those who order their groceries online substitutes are something you come to accept.
That is unless there's a gaping gap between what you order and what you receive when the delivery driver arrives. Double is the problem when it's time-sensitive – such as at Christmas – and you really need the item that's been swapped for something entirely different.
For the majority of shoppers who order their Christmas big shop online, substitutes are little more than an inconvenience. But occasionally – especially around Christmas when things are at their busiest for the pickers and packers – substitutes can be bewildering, infuriating even.
