Sorry to hear that your friend was treated that way, but never ever buy so called "authentic" items at chinese malls. Chances are it might look soo "real" but it's probabaly a really well made replica... sometimes if u put these replica next to the authentic bag, they look identical...

and if your friend was expecting to buy a real Coach bag, she might as well just shop at the Coach store.
The only thing i buy from crystal mall is 1. Food/drinks 2. designer glasses and contact lens...