Has this happened to anyone? How should I follow up with this situation?
You should complain. This may not happen. Prepare yourself and go into one of their retail stores or call them. When you're talking with them, keep reminding them that you are 'a very important business man' and insist that they 'keep the promises they gave the board of your NASDAQ-listed company' and that otherwise 'followup orders in the magnitude of a couple million USD won't materialize otherwise'.
Some people had some success with threatening to 'roughen them up a bit'. I don't know about that, though...