Twitter is great for two way communication, as long as you don't complain

Here is a story from the twitterverse: 

So when I saw product changes a couple months later that seemed poor, I let fresh&easy know.

(note that I later corrected to Nestlé) F&E had no response. When the new non-organic product was missing from the shelves, I wrote to F&E again.

It is now Sunday, October 18, 2009 and I still haven't received a response via twitter for any of my comments. Why solicit customer feedback if you don't acknowledge that you receive it?  While I am not being blocked by @Fresh_and_Easy, I'm surely being ignored.