An existing order can be updated with additional items as long as the order has not yet been completed for picking.
You can watch a short video on how to add items to your basket:
https://youtu.be/7mqUYZkQe0I
If you can't find the information you need, please reach out to the "LastMile" customer service team. You can contact them by email at support@lastmile.lt, or through the "LiveChat" platform.
The customer service team's hours are from Monday to Sunday, 08:00 AM to 10:00 PM.