The fastest way to deliver the ordered midifile(s) is to send it by email. You will get your midifile(s) in an enclosed zip-file. So please make sure your email account will accept enclosures in zip-format.
If the delivery status in your accout is set to DELIVERED but you didn`t get it please check also the spam-files. Some email providers will prompt send emails with enclosed zip-files to spam or block it totaly.
There are no costs of delivery at this way of delivery.