Thank goodness most Supermarkets no longer use those horrible plastic bags, which caused so many problems for wildlife. The dreadful ones use by Iceland are one of the main reasons I will have deliveries from them. Most use large crates. I live in a flat, and they bring those crates up to the front door of my flat, where I meet them with my wheeled shopping bag into which I put all the shopping. Then I just wheel that into my kitchen to unpack and put away.
Do not think I would like to have someone else try to put away my shopping - would cause me more problems than doing it myself trying to tell them exactly where to put everything. Once frozen stuff and fridge items are stored, the rest can be put away slowly.