You can manually import your orders by using the order export module
you can purchase and have a go at the demo at the following link.
TO CREATE A COMPATIBLE ORDER EXPORT WITH OSOP USING THE PRESTA SHOP
ORDER EXPORT MODULE DO THE FOLLOWING:
(insert pic of main page)
On this page you will need to set the following fields to equal the
- File format = CSV
- Date format = Y-m-d H:i:s
- Each product...