Asus I/o Shield Missing Why Won't Asus Send Me The I/O Shield That Was Missing From The Motherboard Package?

Why won't Asus send me the I/O Shield that was missing from the motherboard package? - asus i/o shield missing

I have asked them to send me the missing, but he said they refuse to do so and they would need to buy. Who should be the responsibility of the manufacturer or dealer, or do I? I bought TigerDirect.com.