First, you should try recovering the file from snapshots yourself; to learn how view the documentation on recovering files from snapshots. If that fails, email firstname.lastname@example.org and ask them to restore your files. Include the following information:
- When did you delete the file(s)?
- When did you create the file(s)? ("Not recently" is enough)
- When did you last change the file(s), before the day you deleted it/them?