[URGENT!] Possibly bricked phone when downgrading [SM-N910C]

Hi All,

I had Android 4.4.4 (KK) running on my Note 4 (SM-N910C version). A week ago, I decided to upgrade to 5.1.1 (Lollipop) but after using it these days, I decided to go back...
In the past, I have installed 5.0.1 LL on this phone and went back to KK without any problems whatsoever, but this time, when trying to flash KK back on Odin, it ends at "FAIL"...

At the same time, my phone displays "SW. REV. CHECK FAIL. DEVICE: 2, BINARY 1". I'm afraid it is now soft bricked, when I try to reboot the phone to system, it gets stuck on the main screen (samsung logo and model) and it never continues...
This is what I did to my phone so far when installing 5.1.1:

1) Flashed 5.1.1 firmware.
2) Rooted using talexop Kernel.

My phone has the latest version of TWRP recovery installed. I need urgent help :crying:, leaving on Holiday in a week and I need my phone functional! I tried googling and searching over the forum, and I saw some stuff but it was not really helpful for my case.

Any advice will be greatly appreciated!
Thanks a bunch in advance,

museruy

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