[Q] Stuck in bootloop (Brick) - d855 topic

I tried to flash a new nightly of cm12 on my lg g3 and the flash procces was stuck and the screen froze so i put my battery out and when i tried to power on i was stuck on the lg boot logo (bootloop), i can't go to recovery and the only thing i can do is to enter download mode and it goes to fastboot mode not into "Firmware update" like i saw in other guides in the internet. i tried some commands ("erase recovery"...) and it just fails and shows this error:

erasing 'recovery'...
FAILED (remote: failed to erase partition)
finished. total time: 5.032s

What can i do to fix my phone?
Please help me i'm in this situation for a week now and i didn't found soulution yet...
Thanks for the helpers