Did you follow the steps in the first post in this thread?
Did you check the OneDrive online Recycle bin? Right click the OneDrive cloud icon in bottom right system tray to View Online, click on Recycle bin and check for your files to restore.
Also right click cloud icon for Settings, check the Settings tab that Files on Demand is not enabled (storing them only in cloud to save space on hard drive), and on Auto Save tab confirm the folders you want sync'd to the cloud are selected or not.