[Q] Flashed Hex'd HBoot, think I made the file size a little big. Phone doesn't boot topic

Hi there,

Long story short. Im on holidays using a MAC which I am not used to (Windows User). Ran a hex editor to change up some text for the boot loader screen (UNLOCKED to LOCKED) but I think I Hex'd it wrong. I then zipped the hboot.img into the firmware.zip and I flashed it on my phone using:
fastboot oem rebootRUU
fastboot flash zip firmware.zip

Phone now won't turn on. Im fairly sure I hard bricked it.

Any advice on what I can do to fix it/if I can fix it?
The screen has a pressure crack in the digitizer which I'll be getting fixed through warranty with Optus Australia although I'm fairly sure technicians will see what I've done straight away concerning the software side of things.

Cheers