My question involves landlord-tenant law in the State of: CA
1) When I moved in, a staff in the landlord's office said that they were changing the mailbox. So they asked me to come tomorrow to pick up the mailbox key. I received other keys.
2) A few days later, I visited the office again. They said that the key is not ready and they would need some more time.
3) I walked around the apartment complex, and realized that the mailbox for my apartment unit did not even exist.
4) When I tried to apply for mail forwarding service, USPS did not recognize my apartment address. Later, I got messages from immigration office and other places that they cannot locate my apartment. I had a hard time with internet providers as well, since they could not locate my unit either.
5) I talked to USPS mail carriers, and visited the USPS office to escalate this issue.
6) Eventually, a month after I moved in, the apartment management installed a new mailbox only for my unit. I thought that would be the end of the story.
7) However, I happened to meet a mail carrier again. He said that my mailbox is unapproved, thereby they cannot put any mails there.
Would anyone please give me any idea how to resolve this issue? Any legal advice will be appreciated.

