Note 10.1 Firmware upgrade encountered an issue

Hi
I've flashed firmwares before on Galaxy mini, Galaxy grand prime and Note 10.1 GT-N8000
So I'm a little oriented with the flashing process and even the rooting process of my devices

I've used Sammobile many months ago to get the 4.4.2 firmware that was non-official, and it worked fine for many months & I have rooted my note a couple of months ago and it was working fine, but the problem was that the charging time usually exceeded 8 hours
and that was too long as I was starting to use my note longer than usual lately

So I tried 2 days ago to downgrade to an official 4.1.2 ROM but The process Failed and I got that message:
"Firmware upgrade encountered an issue
Please select recovery mode in Kies & try again"


I tried recovery mode, but I haven't backed up my firmware on Kies before, so it didn't work for me as Kies didn't find any backed-up firmwares on my laptop

I tried firmware upgrade & initializing.. I entered my model and S/N, but I got a message that this model doesn't support initializing!

I've windows 10, and I've tried Odin 3.07, 3.09, 3.10, 3.11
I removed my external memory card, stopped the antivirus, changed the USB port and tried flashing many other firmware versions, some are 4.1.2 and the others are 4.4.2, some are official and others aren't, including the non-official version that I think I've used before
But all my trials failed to get my note working again! and I'm always stuck with this message and can't even turn my note off!

Please, can anyone help me in this problem?

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