Can't get bootloader unlocked

Trying to unlock the bootloader, got my Unlock_code.bin file, but when I try to use it I get this error message:

C:\Users\Will\Desktop\fastboot>fastboot flash unlocktoken unlock_code.bin
target reported max download size of 800000000 bytes
sending 'unlocktoken' (0 KB)...
OKAY [ 1.007s]
writing 'unlocktoken'...
(bootloader) flash unlocktoken
(bootloader) [KillSwitch] : /dev/block/bootdevice/by-name/frp
(bootloader) [KillSwitch] Last Byte is 0X01, enable unlock
FAILED (remote: UnlockToken Verify Fail!!)
finished. total time: 1.082s

And of course when I reboot into bootloader it says it is locked. Tried moving the file with fastboot and the unlock_code file to a couple different places and nothing helped, and rebooting both phone and PC. Any ideas?