Have you tried calling her? I can think of several reasons for not replying to an email and none of them have anything to do with ignoring the message. Don't make assumptions.
Have you paid in full for the work or did you reserve final payment until you were able to see it? Has she quilted for you before or is this the first time? Did you see her work first hand before you sent your quilt to her? Do you have a contract for the work? Did you ask for references and then check them before sending your quilt?