My call log not showing call history

[AC Question]

Im using samsung galaxy e7.. n yesterday i noticed that my cal log not showing any call history now.. n wn i opnd my contact sumtym it shows contct list being updated n my msgs are tking time to load.. wn i restart my phn ds issue is solved for sumtym bt call log stil nt showin cal history n again same msg loadin tkin tym n cntct list being undated is shwn sumtym.. i tried evrythn soft reset.. reset the date n time.. still its not solved.. plz hlp wats wrong wid my phn. Should i do hard reset.. or any software prob.