Hi
mutmainnah.zulkifli2000Thank you for your asking. Have you try the factory reset in recovery mode? Please try following steps to access recovery mode.
1. Keep pressing "volume down key"
2. Press "power key" and stop press " power key" once you feel the vibration
3. Still keep pressing "volume down key" and stop press "volume down key" once you enter [Android Recovery] Screen
4. Choose "Wipe data/factory reset"
#Hardware Reset Guide
https://www.asus.com/support/FAQ/1006346/