Garageband files missing!!!

My garageband files are suddenly missing from my iCloud and there is no way I am being able to recover them. I wanted to see if I deleted them by mistake and tried the "Restore Files" option from Data Recovery in iCloud.com but the garageband files do not show there and moreover when I "select all" to restore, it can't restore more than 90% of the files. I have no idea how all the music I have been working on for the past 3 years has just disappeared! I am trying to reach out to the Apple support network but can't find any info. PLEASE PLEASE HELP! I can't lose my 3 years work of worth... It will absolutely destroy me.