Hello! Thank you for the purchase and we apologize you're encountering the problem. Here are a few possible solutions you could try.
If you claim the download, either from the top of the page or your library, like in the screenshot below, can you see the files?
https://drive.google.com/open?id=1xR1puJ3HpKwJ-h4ifLWbgXbbmmR62lrR
Please let us know if it works! Thank you and sorry again >w<"