I think that by issuing "sudo deluser --remove-all-files satimis" you really deleted your files. If that's the case
"dar" won't be of much help. I do not know the command, but according to the link you gave, it sounds more like a
backup/restore program which means that unless you have a backup/archive, "dar" is useless for your problem.
One way, if you had an ext2 filesystem is to read and follow instructions of the following HOWTO which uses the
command "debugfs" :
Basic recovery procedure can be summarized as follows:
1) use debugfs to retrieve a list of deleted inodes
2) select the inodes you wish to recover (most likely based on deletion time)
3) use debugfs to recover selected inodes
4) sort recovered inodes (maybe the most tedious step: once a file is deleted you lose its name !)
The HOWTO targets ext2 filesystem but since "debugfs" supports ext3 also, it may also work with ext3. A similar command also exists for ReiserFS: "debugreiserfs", so something similar might hold for ReiserFS.
There are surely other tools, maybe more user-friendly than this method.
Try again in Google using variations of linux recovery, linux undeletion etc.
In any case make sure you BACKUP FIRST any remaining valuable files.