If you are using GAM for direct sold, or just Jeeng's AdFill network for backfill, reporting is broken out separately.
Reporting for impressions served through GAM will be available through the GAM portal.
Reporting for Jeeng backfill will be available through the Jeeng portal (manage.Jeeng.com). Ask your contact for access.
With GAM's reporting, you should have full access to all information at the ad unit, line item, or creative levels. With Jeeng's backfill, you have access to data at the company, newsletter, or individual placement level.