Z3 Compact Bricked after flashing a wrong firmware

Hi guys, I'm currently having problems with my z3c. All happened by accidentally flashing the wrong firmware. After all the wrong flashing now my phone won't turn on nor it will go to "flashmode" using the sidekey method. Only way to get in the phone is by doing "Fastboot" method! Is there anyway i can fix this brick by flashing a stock firmware using fastboot method?

Thanks!