Softbrick on my galaxy note 10.1 2014 p605

Hello everyone!
Yesterday I wanted to flash my tablet with an updated firmware as in the country I'm in we don't get updates automatically. Also I wanted to clear the tablet of junk so I used TWRP to clear everything: Note: I had been rooted before, using towelroot.

• Dalvik Cache


• System


• Data


• Internal Storage


• Cache

Then I downloaded the 2015 Kit Kat 4.4.2 version from Sammobile. The day after I used ODIN to flash it but I believe the USB cable might have gotten disconnected, as it has sort of worn out, during the process. Also: From the very beginning Odin didn't show the model name, which I found strange. I tried flashing it again with a different cable but now it failed at hidden.img.ext4.
Afterwards I (probably stupidly) tried to flash it again with the NAND ERASE ALL option -derpface- enabled - obviously it still didn't work. Then I couldn't boot into recovery anymore. I am not certain it was at that point that recovery stopped working, could've been earlier. Pressing the usual combination for recovery (power + Volume Up) instead boots into Download where it says:
Could not do normal boot.
ODIN MODE
PRODUCT NAME: SM-P605
CURRENT BINARY: Custom
SYSTEM STATUS: Custom
KNOX WARRANTY VOID: 0X1 (4)
QUALCOMM SECURE BOOT: ENABLE (CSB)
RP SWREV: S2, T2, R2, A2, P2
UDC START
Normal booting just gets you stuck at the SAMSUNG Logo.
Pls help