sigh.... I really hope you and your LA quilter can work this out. This comes under the heading of "Sh__ happens" but it's repairable - as is your relationship - IF the lines of communication can stay open.
This post just makes me sad. Not just about this quilt, but some of the responses. Call the BBB? Take her to court? Destroy her at the local quilt shop?? Get a rope??!! OMG! Things happen, and depending on the size of the hole, it could be missed in the final inspection. I don't know how many times I don't spot missing quilting until after I post a picture. And I would be just sick about a tear or rip, and would do my best to make this right. AS WOULD EVERY LA QUILTER I KNOW!!! But in the grand scheme of things, this is all repairable. Please chill people!