To delete a story after you've boosted it, you must first delete the ad (even if the ad has already finished).
To delete your story that has been boosted on Instagram:
- Go to your profile.
- Tap Professional dashboard
- Tap Ad tools.
- Tap Edit next to the ad you would like to delete.
- Tap Delete ad
- Tap Delete.
Once you've deleted the ad, you should be able to delete the original story from your profile.