HOW TO RESTORE LOSEN DATA

Restoring from an existing TimeMachine backup would be the only way. Have those documents have also been saved in iCloud Drive?

Restore items backed up with Time Machine on Mac - Apple Support

Restore your Mac from a backup - Apple Support

good computer practice before sending the machine in for service.

friendly suggestion, using all capitals is generally considered shouting.

yes we understand the urgency but we can easily read the wording without all capitals

Back up or transfer your files

Back up your files to an external storage device

Transfer your files to a new Mac