Update on post office problem. Getting frustrated. Any advice?

[Karen]

My mom went back on Wednesday to talk with the Postmaster and waited and waited. She finally had to leave before talking with him. She had checked the mail then. There was nothing. It hadn't been checked again until today. I asked her for one of the keys. There was nothing there. I called her and told her. She then went up there herself. She was able to talk with the postmaster. He said that there had been no advertisements all week. EXCUSE ME? I've gotten tons of advertisements at my house. This is right before Christmas. Yes, there are advertisements. He told her that he would change the locks on the box for us and issue new keys without charge. He doesn't know how there was an extra key, but he guaranteed her it didn't come from them. Doesn't anyone care how it happened? How can he say it didn't come from them? Where else would it have come from? The keys say USPS DO NOT DUPLICATE right on them with the unique code for the mailbox. Why isn't there some sort of investigation about this?

Does anyone else know what kind of recourse we have or who else we could/should talk to next?

Let me bring this to Lady's Human's attention - he works for the USPS.

[Moesha]

Thank you. I sent him a PM asking about getting the number for the district office in my area. I did that because of his other post about contact the office if the mail was late.