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and I've tried using my email to unlock the screen but it said my password or email are invalid and I am very sure that my password and email are correct but it yield the same result... please anyone help me
You need to perform a repair
Switch off your phone and unplug from Pc
Start PC Companion and select Support zone then Update my phone/tablet then in Blue Repair my phone/tablet and follow the onscreen instructions - When prompted connect your phone still switched off holding volume down - This should start the repair or reformat process
If you are using Windows 8/8.1 or a 64bit operating system then adjust the settings for PC Companion and run in compatibility mode and chose Windows 7 or XP