The best way I know of is to go to
www.fictionwise.com (the parent of ebookwise.com and click on the help in the top right corner of the page. From there in the left side of the screen under "How Fictionwise Works" select "Online Database: Contact Customer Support" This brings up a screen with a drop down box with a tag of "Topic" Select "Suggestions and Feedback" When the "Get More Help" button pops up click it and you will have a form to submit your requests to them.
When I have used it they have responded within a day or two (except weekends.) They are very responsive.