Bricked phone, won't turn on/fastboot/recovery

So yeah, I screw up by a lot, but let's see if someone can help me/

I tried to update twrp on my phone and it got bricked, ADB was not seeing the device but Mi FlashTool was with a code but not COM, tried changing the phone drivers brom 900E to QL8000 and it got registered by MiFlashtool as COM and another code, the phone was still showing there even if I could not make the phone go to fastboot mode, just blackscreen; I tried to reinstall stock rom with it but got stuck at "flashing"...

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