Hard Reset SAMSUNG S5282 Galaxy Star Duos

Power off your phone.
Next press and hold together Volume Up + Home button + Power button until logo Samsung appear.
Now you will see android guy and after "Android system recovery" menu.
Hover using Volume buttons on option "wipe data/factory reset" and select it with Power button.
Confirm operation "yes" using Volume buttons and Power button.
Then select option "reboot system now".
Wait for restart.

Well done!