I'm so sorry you had bad results in having your quilt, quilted!
Is it possible for you to post photos of the pleats, and the entire back? Sometimes if they aren't quilted in, they can be steamed out with an iron....
If I lived anywhere near you, I'd come and check out the results and hopefully be able to offer a suggestion.
Did the longarmer give you and definite reason on what you "did wrong" that she says caused the problem?
Did she give you any guidance on what to do in the future (besides not hiring her) to avoid the problem again?
Do you live in central Illinois by chance?....I'd come and offer help if I could!
I think it, if not a voilation of board policy, posting the names of bad longarm quilters could keep a lot of quilters from having the same experience.
It is such a shame that she didn't respect the time and effort you invested in your work!
Sue