You must read on flashing guides and be 100% sure you have read and learnt everything.
I could post a How To here, but if you got stuck or made a mistake you'd have to ask here again and maybe no one would respond for a while and you would be stuck. So it's a lot easier if you try to find for yourself so you can learn it, and maybe one day teach someone else how to fix
EDIT: I am not being rude by not helping, just I am trying to fix my device also after Hard brick
The people of XDA, including the Devs. Do not have to help you. We all choose to help. Everyone also starts somewhere.
City I live in makes and invented the Kitkat... I run Kitkat on my device. Aww how cute.
CM11 N9005(Note 3) - Nexus 5(D821)