Is my phone bricked? Urgent help needed

So basicly, I ****ed up by installing a 6.0.1 bootloader on my 5.0.2 system and now it won't even load up the recovery menu. The only menu I can get into is the download, from where I can press the down key so it actually shows the boot icon. It isn't running in a boot loop and I can't even turn it on from turned off, by holding the power on button. I can't transfer files from my pc to my phone either.
I'm running the SM-G925F
Any help would be appreciated