Bad customer service at LightInTheBox

I paid one full amount for 9 items purchased online at LightInTheBox. One item was not available and I was promised a refund for it. Instead of getting 8 items all at once I have received 2 parcels for 3 items on different dates. I still have 5 items outstanding. I am not happy with the feedback received from them that I must contact custom as if I did more than 2 purchases whereas I did one purchase for 9 items.