Thanks again to all who have left comments regarding your experience trying to get through to California EDD. It seems their normal English line will always be busy, so it becomes necessary to find other means of getting through. One of the comments on the List Your Tricks page seems to be another valid method provided by Jeff H for getting through to EDD, using a different phone number than the one in my original post. For this reason, I have decided to post it here and wish success to all who try it.
Here's the trick that has worked for several others on this site:
Here's the trick that has worked for several others on this site: