Amazon package was stolen

This is the first time that this has happened to me so I don’t know what to do. I live in an apartment and my package was delivered at around 1:50pm and the picture showed that it was at my front door, but when I went to go get it (at around 2:20pm) there was nothing there. I thought my boyfriend was playing a prank on me, but turns out he wasn’t. I contacted customer service but they said I had to wait 48 hours and they literally showed me the picture of the Brita I ordered at the front door but I don’t have it :( maybe they didn’t believe me idk. I’m genuinely sad. We asked our neighbors and we even waited a little just in case the person who stole it felt bad, but nope. What do you guys usually do when your package is stolen? I just want my Brita lol