How would one submit a change or modification in the DJI no fly zone designation.  There is a designated flying area near Van Nuys airport and has recently been marked as a no fly zone by DJI.  How does one get a site removed or modified with restriction on DJI's database?  I know that it's within the 5-mile range from Van Nuys airport but it's a designated area and airplanes don't fly below 400 feet in the area.  I'd be happy with a restricted are no higher than 200 feet.
http://www.valleyflyers.club/appolo-xi-field.html

I'm currently trying to do the same thing, were you able to get any direction from anybody to help you out with this?