Files are gone, folderstructure is there

Dear community,

I have a one drive account with a extensive folder structure. Today I noticed that the folderstructure is intact (on my laptop and online) but the files are mostly gone for 90%, here and there a folder with some files. My account is a personal 356, have 1 terrabyte.

I tried to restore the drive through the instructions I found online by Microsoft, go to settings, one drive restore, check recycle bin, etcetera. Nothing helped. I did not deleted the files manually. I honestly do not know what to do?

Tried to get in contact with Microsoft but that is totally impossible. Is there anyone that has expirienced this also? I use onedrive now for many years and never had this. 

Please help