Airtasker and TaskRabbit
Two other sites where you can hire someone for an errand. Each sets its own fees, so check them on its own site before you book.
If you have read that Aldi delivers, you were probably reading something American. It is true over there and it is not true here.
Aldi in the United States works with Instacart, DoorDash and Uber Eats, so an American shopper really can have Aldi groceries brought round in an hour.
The British business made a different call. It tried delivery with Deliveroo, tried click and collect, and closed both.
The short version is that the prices are the whole point. Picking and packing somebody else's shopping costs real money, and it has to come from somewhere. Aldi decided it would rather keep the shelf price down than add a service that puts it up.
You can disagree with that and still see the logic. The way round it here is someone who is going to the shop anyway.
Other ways
Two other sites where you can hire someone for an errand. Each sets its own fees, so check them on its own site before you book.
It need cost nothing, and someone nearby may be glad to be asked. A local Facebook or Nextdoor group is another place to ask.
Help with shopping for older people in some areas. Ask early what runs near you, and whether there is a charge.
For a big weekly shop, Tesco, Asda, Sainsbury's and Iceland all deliver. You pay their prices, not Aldi's, but the van comes to you.