You are over reacting, the designer didn't realize about the sensitivities, she apologized and cancelled those swim wear, that should be the end of it. Its a one off incident anyways.
Also the bikinis with Australian flag exists! Aussies are OK with that. Am not going to post the pictures for it here, but do a google search and you ll find it.
I have freaking 2 pairs of boxers with australian flag l0l.
No just 1 i only say 2 so i dont look dirty.
I keed i keed