If it’s the documentation, they will provide the additional info. Some of the items may not required a documentation. You should better check if the rejection is due to documentation first.
Create a help file:
This should include concise instructions on installation, customization and use, written in English and formatted as a .pdf or HTML document. Keep in mind that buyers may have little to no familiarity with design software, so incorporate clear explanations and visuals when necessary. You may create a screencast or flash instructions in addition to, but not instead of, text instructions. A documentation template can be found here.
Note: Do not assume that the buyer of your item has any significant level of coding knowledge. When preparing your documentation, treat the buyer like a beginner.