Sorry to hear that you are still having the problems with the downloadable product. You can provide the information for your website in an email to email@example.com. Please make sure to include "Support Center - OpenCart Issue" in the Subject so that we can filter it out from all of our other email.
Before you do that, I was reviewing some forum comments on the issue here
. Make sure to check your error log to see if there's anything there that might give you some answers as to why the order is not completing. Additionally, one of the users stated that you might want to check with Paypal to see if the transaction actually completed. If PayPal is not completing, then you will also get the missing order indication. Were you seeing that transaction completing in your tests? There is also a suggestion for an Abandoned Cart order extension
, but it costs $20, so that will be up to you if you want to utilize that as an option for your OpenCart installation.
If you send us an email with more information, please confirm that you're doing that in the comments here.
Thanks for your patience! If you have any further questions or comments, please let us know.