Have you tried using EMMA (chat). Sometimes that is more effective than calling.
If person on the other end of the chat acknowledges your request then you have a basis for appealing any denial of your N-400 case. Screens shithtye chat session and/or record it (an Apple Mac’s screenshot utility lets you record a video of your screen).
The other benefit of chat over the phone is that there are laws regulating recording your own phone calls but for chats not so much.
Since you will still be around on the day of the oath, you could try attending the oath and explain the situation. You would not surrender your gc or take oath.
OTOH,
1. Granted this is a long shot, if folks from the passport agency are there and willing to do an expedited passports, you might be tempted to concentrate the oath, Or
2. Reportedly is is easy for a Filipino to get a visa for Mexico. So complete the oath and don’t apply for a passport. Instead travel to Mexico and walk into the USA using your naturalization certificate. A variation of this is to apply for your passport and use a photo copy of your naturalization certificate to walk into the USA.
Even if 1 fails, 2 is viable.