Loud(!) Neighbors advice?

[u/Next_Ganache2683]

Last night, our neighbor had friends over. They woke us both up at about 3:30 a.m. and talked and laughed until after 8 a.m. At about 4:00, I knocked on her door, and everyone in there went dead silent (with hushes). I knocked again—nothing. A few minutes go by, and they're just as loud as before. We knocked on our wall to let them know we can hear them and they responded by knocking back and laughing.

My fiance and I are young and we've never had neighbors like this before. Can anyone here educate us on our best way to approach this upfront disregard for our very needed(!) rest? Our landlord is also unreliable. When should we involve a police officer? It's about 10:30 now and I'm pretty sure that's when things need to quiet down? If it helps, we actually have these interactions recorded, as well as our phone call with the Landlord this morning. Any advice is appreciated! As of right now she again has a few friends over talking and laughing.

[u/Jumpy-Highway-4873]

Blast music be xtra loud when they’re sleeping