This is not Girl Guides Australia, as their thick accents seem to say. They are actually GoGuides.org. A dodgy online directory, who's page doesn't even work. When you ask them again who they are, you think it's Girl Guides, so you ask them, they say yes. That then is fraud.
Girl Guides are looking into suing them shortly.

I called back number (02) 8320 6060 rang 2 times then goes to busy tone.

directory listings for websites

say that they are from girl guides.
fraud, just wanted credit card details.
block number