iCloud shows FULL even though I have removed all files and disabled iCloud drive on my Mac

Hi there

I was using iCloud Drive for a while, I was on the 50GB storage plan using about 16,5GB of it, and after a couple of months, decided to change over to another cloud storage option. I removeed all my files from the icloud drive, but it still shows that my storage is FULL and that there is 16,5GB of document storage still being - used even though I have removed all files from the iCloud folders both on my Mac and online. I even disabled iCloud drive storage on my Mac. Yet when I log on to my profile on icloud.com I get the warning that my iCloud is full and that I will not receive emails to my email box.... Where am i suppossed to delete the files from?

~library/mobile documents/apple etc has disapperaed too

Any ideas?