It appears that a huge number of people have this problem, so maybe your interface people could look into it because it's too easy to make this mistake.
I accidentally licensed an item in Adobe Stock that I though I was adding to my library. The item is #110178706.
How do I un-license the item?
And again: #131789561
And again: #168254312
It's extremely, extremely frustrating.
As you have accidentally licensed the above-mentioned images, I have added 3 image credits to your account so that you can license different images instead.
Also, please see Stock FAQ: How to license an image with Adobe Stock? in order to license Adobe Stock images.
Hope that helps!
Feel free to update this thread in case of any additional query.