hi there, i am a consumer in melbourne, victoria, australia. my daughter has one of your 'magic art' products called 'plaster work - letter'. very unhappy with the product. instructions not very clear. left letters to set for 48hrs and most have crumbled when taken out of the moulds. was purchased through KMart in australia. who can i speak to for advice or to rectify the problem? thanks in anticipation, kind regards, laura de gilio