1) Go you campaign via the campaigns link at the top of the page

2) Click on the influencer you wish to delete from your campaign

3) Scroll down the page and click on the 'Delete' button - on the left hand side of the page

4) Click 'Delete' again to confirm

The influencer is now deleted from your campaign. But please remember that al the posts and stories being tracked for that influencer are also deleted. Posts can be manually re-added via a URL - but stories will be lost forever.

Good luck!