I've got an XML file that I auto generate and upload daily...

I am trying to figure out how to take that, and automatically import it at a certain time interval (daily) - using Volusion's API. to Close the order and add the tracking number.

by what method/service can take that XML file and send it through Volusion's webservice.aspx to do this task.

(trying to prevent myself from having to keep doing it manually by importing a .csv through the admin panel)

this is what my XML looks like: