Tiffanystore.org appear to operate from a room in a hospital in China?

In December 2009 I purchased a necklace (and free gift) from Tiffanystore.org ,which, when received was not as advertised. I notified them (as per return policy) of my disatisfaction, they then offered a small percentage of the value and keep the necklace. As it was of no use to me, not being what I ordered, I declined. They upped the offer by a couple of pounds, which I again declined. They then supplied me with the address to return the items which is "Leon Lee, Room 417, Auxilary Building "D", Provincial Maternity and Child Health Hospital, West Guang Yuan Road, Bai Yun District, Guangzhou, Guangdong, 510010, China" I would not have made the purchase had I seen this address in the beginning and therefore would not have been "ripped off". The goods were returned by Royal Mail International signed for Service. All attempts to deliver by Chinese Postal Service were unsuccessful and the goods have eventually been returned to me (ie today). Has anyone got any advise on how we can gain redress and at the same time preventing anyone else being conned by them.