1. They do respond saying it was a mistake and all has been cleared up, trading will begin after xxx period of time on the OTC.
2. They do respond, admitting there were accidental, procedural mistakes to try and cover their butts from being sued and not be held liable (won't work). They have a fiduciary responsibility to look out for the best interests of shareholders, oversights/accidents shouldn't happen.
3. They don't respond because they know they screwed up and don't want to add any potential more fire on the inevitable lawsuits (words may be used against you sort of thing).