ROne21,

Could you be more verbose? Like had you done some installations, some tweaks that led to your data disappearing or was it one fine day everything just disappeared?

Also what steps have you tried to remedy the situation? I would think you should copy the .db to your PC to have a look; its located at /home/user/.cache/tracker/meta.db


Lastly, please change the thread title to "[HELP] All Messages, Contacts & Call Logs Missing" so that people offer their advice instead of thinking the thread has been deleted etc...
Edit: Thread title has been changed to better reflect your query.