Deleted Photos/Albums are still taking up Cloud Storage

I've tried every way suggested that I can find so far. Despite un-syncing and deleting the albums in LRClassic, deleting the albums AND the photos in all Cloud/Mobile apps, emptying out the Deleted folder "permanently", and verifying there are no files in any library, folder, or the deleted section of the Assets page, my cloud storage is still "full".

It seems the final option is to use the LR Web app to "Delete All Synced Data" and start over from scratch, but about half of the storage is taken by folders I still want synced. I just want all the albums & photos I've already deleted in numerous ways to actually be deleted, while still keeping the photos I've kept synced otherwise. Going from 20GB down to 10GB shouldn't involve deleting all 20GB of data then re-syncing the same 10GB I don't want to delete in the first place.

Is Adobe really expecting people to only ever Upgrade, rather than clearing out space to sync new folders? At this point I'm looking to learn how to build my own cloud server to circumnavigate this terrible user experience.

Any suggestions other than burning it all and re-syncing again would be greatly appreciated.