That`s one of the most frustrating parts about publicity - Most of the time you don`t have control over the final story. It can be cut due to a breaking story, spacing, or any other editorial choice. And media members are swamped right now working with limited budgets and staffs.
Since you`ve already contacted the journalist with no response, you may want to contact the media venue directly. Try to get in touch with someone in the advertising department and ask them to check on the article for you.
Many times, a sales person, receptionist or intern will be happy to look up the article for you. If not, all you can do is continue to check online for the article and pursue other opportunities.
Hope this helps,