Well, I finally received a response today from DL. I could not have written a more generic reply if I tried. The response basically thanked me for my business and apologized for my inconvenience. Unsurprisingly, it did not specifically address the problem of even mention the word baggage. Perhaps a software program sends a generic reply after several days' wait, so that they can save on labor costs.

I wonder why I, or anyone for that matter, even bothers writing to airlines about service problems, large or small