Motorola Moto G3 XT1541

Hi,
I've got a Motorola Moto G XT1541.
Being an android newbie, and bored one time I tried to root my device with what I think was the KingRoot App, and being stupid and not bothering to read to much up about it (as I wanted to store apps on the SD card as internal memory is limited) it obviously bricked my phone! It currently only boots up in the fastboot mode only stating:

"Start up failed. Your device didn't start up successfully. Use the Software Repair Assistant on computer to repair your device. Connect your device to your computer to get the software repair assistant.

AP Fastboot Flash mode(secure)
hab check failed for boot
Failed to verify hab image boot
failed to validate boot image"

Details on the device: Device is locked. status code: 0. Osprey XT1541. (Any other specifics needed just ask).

I have attempted to flash the firmware back to standard again which hasn't worked. (Obviously I'm doing something wrong!) the answers to the commands i have included below.

fastboot flash partition gpt.bin
sending partition okay
wiriting partition... INFOPreflash validation failed FAILED (remote failure)

fastboot flash motoboot boot.img
sending motoboot okay
writing 'flash'... INFOPermission denied FAILED (Remote failure)

fastboot flash logo logo.bin
sending logo.. okay
writing logo.. okay

fastboot flash boot boot.img
sending boot ... okay
writing boot... INFOPREFlash validation failed

fastboot flash recovery recovery.img
sending recovery .. okay
writing recover.. okay

fastboot flash system system.img_sparsechunk1
error: cannot load 'system.img_sparsechunk1'

fastboot flash system system.img_sparsechunk2
error: cannot load 'system.img_sparsechunk2'

fastboot flash system system.img_sparsechunk3
error: cannot load 'system.img_sparsechunk3'

fastboot flash modem NON-HLOS.bin
sending modem... okay
writing modem... okay

fastboot erase modemst1
erasing modemst1... okay

fastboot erase modemst2
erasing modemst2... okay

fastboot flash fsg fsg.mbn
sending fsg... okay
writing fsg... okay

fastboot erase cache
erasing cache... okay

fastboot erase userdata
erasing userdata... okay

fastboot reboot

Any help would be greatly appreciated as trying to learn this as I go :)

Thanks

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