Don't ever expect that the phone will be answered in the Nepali Embassy. As you call, after some recorded information, you will even hear the request "Please don't leave any message in the voicemail," and even when you dare to leave a voicemail, what you will hear is "This voicemail is full." That's such a shame.
What I suggest is just print and fill up the form, send along with photographs, return postage paid envelope, and money order; you should be able to get your new passport within 2 weeks.