Suspicious of Ms Hansen's business practices, Ms O'Connor encouraged customers to request refunds and dispute transactions with their banks.
Ms Anderson only managed to get two out of three payments reversed through her bank, meaning she was still $808 (£606; A$1,224) out of pocket.
Meanwhile, Ms Hansen had become aware of the Facebook group and contacted Ms O'Connor asking for it to be taken down, claiming that content posted in the group was defamatory - a claim Ms O'Connor rejected.
Ms O'Connor said Ms Hansen also offered her an immediate refund if she no longer wished to wait for her goods.
"I got my refund pretty much straight away, because she wanted to shut me up."
But she decided not to shut up - or delete the group.
"She was just going to continue to do what she was doing, and take money from people because people were siloed right, they didn't know what was going on."
In the group people were sounding alarm bells about announcements from Ms Hansen saying she was rebranding, worried about what that would mean for their undelivered orders.
Ms Hansen went on to trade under a number of different business names online.