Since it's not possible for us to un-license the images, as an exception adding 6 image credits to your account so that you can license different images instead.
Hope this helps !
I actually did something similar -- but just resulting in one image being licensed I didn't intend to get. I was just trying to open the file to get information on what kind of material was shown in the photo. (You'll see I was only downloading previews for now anyway -- but then my finger slipped.) The photo number is FILE #: 124190128, and I do not need access to it at all. Thank you for any help you can provide.
Since we cannot remove an image accidentally licensed, we have given you an extra credit that you can utilize to search and licence an image as per your like and need.
You can verify this by signing to Stock.adobe.com and see the Available License count on top right hand side.