That happened to me once. I had ordered two different collections of fabrics, to make 2 quilts for my nieces quilts. They mailed me the fabric without several of the fabrics to each collection. It was impossible for me to make the desired quilts. I was very upset, and called to find out what happened. They were very nice, explaining that they had sold out of the missing fabrics. They would send a UPS box to my house and I could send the fabric back for a full refund. That was great, but I would have liked to have known from the beginning so I would not have wasted my time designing a pattern for that fabric.