Many of them get PO Boxes. It's their way of separating the mail/bills and not telling you what they've ordered and/or receiving in the mail. As for the bill that is late, you've called him and advised him of the bill, now it's time for him to man up and take care of it. You can't pay something if you don't have the bill.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
