Rachel ... it's worth contacting head office. One complaint won't make much difference on it's own, but if yours is added to many others it becomes worthwhile and without anyone saying anything nothing will be done! I suspect with the information you've provided they'll probably know who you are talking about.
I found sales people so helpful yesterday when I went to buy my ds some gumboots. He's size 13 and it's a hard size to find. The lady at the first shoe shop had a size 12/13 but she said it was too small and she recommended I try Kmart or Big W. She had served us straight away and she was kind enough to show me why the boots didn't fit, etc and told me where else to go. Very happy. I then tried both, without success (none of his size available) so I went to another kids store (Gumboots) and the sales assistant hunted high & low for me until she found gumboots in his size and we even got a lovely bag to go with them. Very happy. Shopping with kids in tow is hard, but helpful shop assistants make it worthwhile and my ds was thrilled with his bright red gumboots!