Good service at the well established postal agency.

From what I can remember, our familys mailbox was PO Box 92 CalviniaMy father who later farmed full time kept the mailboxWhen my father died, I was told that we should renew the mailbox before the end of March 2020It came as a shock to our attention that the woman who stayed with my Dad, without our knowledge, arranged with the post office to get the mailboxIt came to our attention that during February the mailbox lock had already been changed and with my query at the post office I was very sarcastically told that they could do as they pleaseWith whom can I take this matter further