I did have my quilter use a different pattern than we had agreed on. I thought it was my mistake, but my daughter noticed it too. I did take another quilt to her, and asked her why she changed the design. She seemed genuinely surprised.
BUT to cut your quilt???? That is crossing the line! I would never use that person again. How hard would it have been to pick up the phone and call you? Even to call you up and have you sew the sheets together. I am sorry for you.