Help! I have a Tate tablet that thinks its an Ariel.

Hi, I have a kindle fire HD 7(Tate) 3rd gen, and I messed it up. I installed twrp somehow, but when I tried to flash something, it said something along the lines of: Error, this package is meant for Tate, this device is Ariel. Now It won't boot(it goes into Amazon's updating(should take 10 mins) screen and stops when the progress bar fills up completely, it doesn't reboot, it just freezes.), when I try to boot it into twrp, it goes as far as the white amazon logo and reboots. I have adb access when it is in the updating screen, luckily. Fastboot mode won't let me flash anything(flashing not allowed for locked hw), and when I type a fastboot command, I can't type in the 0x1949, because it just says waiting for device, but without it, it recognizes it. Any help? Thank you! More info: imgur. com/V6FymMy

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