2016 CX-3 Infotainment system language change?

Hi all!
I’ve recently purchased a Japan Import 2016 Mazda CX-3 in New Zealand. I’ve ordered an Aus/NZ Maps SD card from Ali Express. The Infotainment System is in Japanese and I’d like it converted to the NZ/AU version. I can’t find somewhere to download the firmware and install it myself.
Does anyone have a link to download the firmware? Some tips to install would be amazing too please.
 
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