Welcome to the Apple Community.
Select the content which is causing a problem and use the 'Report a problem' button in Your Purchase History on your computer.
Currently, if your purchase happens to be your most recent purchase you will need to click the large ‘Report A Problem’ button under the list of previous purchases in order to reveal the ‘Report A Problem’ link for your recent purchase. If your purchase is listed as a previous purchase use the small arrow on the left side of its listing.
Alternatively you can use the receipt email to report a problem.