I received my renewed passport on August 26th. Today is Sept 29th. I haven't received my old passport yet. I tried calling the National Passport Number and all I ever get is a recording with information. I can't get to a Customer Rep.

1. Should I be worried if I don't receive it back? I do have a valid renewed passport.
2. Is there any other way to check on why other than calling the numbers given? By the way, you can't get through to a customer rep as it only provides information, etc,
3. I'm assuming once they issue me the new one, the old one is marked invalid so even if it's floating around somewhere I assume I can use the new one and the old is invalid?

Thanks for any help,