Good luck and hope someone intelligent gets you file to review. 

If they are stating it's a file issue you may need to do a verify and rebuild.  I've had clients in the past where the file gets corrupted along the way - usually from aborts (yes, QB's issue) This process should be able to correct any corrupted files.  Sorry, not sure if you already tried this but if not, this would be your best bet over waiting for QB to review your file and get back to you.