Question Need Help To Install Android 4.3 Again

Hello community, im new here, recently i purchase a Galaxy Note 3 Clone from China, on the website it claims to be OctaCore Version, but i donīt belive that, thatīs why i try to test the phone by myself with Antutu, but it seems that i cannot delete the pre-installed Antutu application that comes with the phone, because it gives me false information, iīm sure it has been modified to display highīs scores...

when i go to google play, i try to download the new version of Antutu, but i canīt, it just update the one that i have it...

iīm trying to erase everything and install again the whole Android 4.3 Operating Sistem, this way i will be able to download my applications and all the stuff that i need...

Well, i press Home - Volume Up - Power and it boot into some sort of screen, an Android Image with a triangle on the stomach appear and i got No Command Message...

What is happening ? i would appreciatte any kind of help...