Review of Bertucci's

I have never been so upset with service at a restaurant ever. I understand that mistakes happen, however I told the waitress before I ordered that I had a gluten allergy and ordered a salad from the GF menu. I had to return the salad due to a crouton in it. When I returned it the waitress acted so insulted and when she brought a different salad said it was only a "little speck" of a crouton. I didn't feel that they understood the seriousness of Celiac Disease.