Good to be true? About Samsung Service Center. topic

Hi. Please forgive me for posting such nonsense. Last time i saw in a post that they actually bring their note 3 into Samsung Service Center and they did reset the knox counter 0x1 into 0x0. I got bored earlier then im thinking to talk or actually go in samsung service center here in the Philippines. The reason is simple. I want to return to 4.3 Jellybean.

Let the images tell you the real details.












So guys. Do you think that they can actually downgrade? Im willing to pay just to get back to JB.