Gallery/OneDrive Sync

[Spikekie]

I've tried to stop the Gallery sync with OneDrive as it's needlessly filling up Onedrive's memory. I've switched off sync on both apps, but still sync continues. I've deleted and reinstalled both apps, still sync continues. To get some space on OneDrive I deleted some of the photos synced from Gallery. It then deleted the same photos I have saved ( I saved and downloaded separately) in Onedrives files. I also tried taking my S20fe back to factory settings and reloading via Google back up. Still sync continues ( it's switched off!!). On top of that, and following all my attempts I've so far lost 100's of special and much loved photos. Microsoft say it's Samsung. Samsung blame Microsoft. What's going on????