iOS 6 Maps Voice is British?

Ever since I jailbroke my iPhone 5, turn-by-turn directions in Maps has been speaking in British English (the man). I live in Australia and it pronounces pretty much everything wrong. However when I activate Siri, it speaks as the Australian English (the woman). I've tried changing Siri's language but to no avail. What can I do to fix this? I really don't want to restore again. Ideas welcome.

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Siri settings see above^

via i.imgur.com