Soft-Bricked

Okay so, I was fiddling around with some applications - user installed ones. Then The device blackscreened I though no biggie It just locked then it went into the boot animation so I waited a few mins then I realized I had softbricked my phone. Now I have a tot file, I have no recovery installed, I was about to install recovery the next day. My device specifically is the E98020h AT&T model. I was not flashing any roms of any sort I have tried flashing stock ROMs to get out of the softbrick and I am a "newbie" to the android flashing things. But most of the guides on here for my phone the links are dead, and the links for the pictures in the tutorials are also dead. Thanks for your time. I would appreciate any help or ideas. Thanks.




Note : I can get into download mode, I have tried Hard Factory reset I get the infamous Boot
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"Factory Hard Reset
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Permanently Erase User Data & Reset Settings?

Press Power key to confirm, and any other key to cancel *I pressed/press power key here*

Are you sure you want to continue with erase?

Press Power key to confirm, and any other key to cancel *presses again*

* Confirmed *
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\ Note the number - which I believe to be the error code is different each time. And these display on the same screen.
[370220]--------------------------------------------------------------------------
[370220]
[370220] Secure booting Error!
[370220] Cause : boot certification verify
[370220]
[370220]--------------------------------------------------------------------------