Force delete folder in iCloud Drive
I have about 50gb of work-files stored in iCloud Drive. But because it didn't work like I expected it to do, I copied all files to my HD again. My iCloud Drive on my Mac is empty, but my iCloud account still says 145gb free of 200gb. When I login to icloud.com, I see there are still files on in a folder (50gb). Every time that I try to delete it from icloud.com and refresh after a while (10 min) the folder is back and I still have 145gb free of 200gb. How can I force iCloud Drive to delete that folder from my drive at all so I can cancel my iCloud subscription of 200gb.
MacBook, OS X El Capitan (10.11.6)