How Can I Found Out Where This Package Is?

I live in Miami beach. I ordered from an clothing online store(lna) and they shipped by UPS but when it got to my city they transferred it to my “local” post office in Hialeah(but that’s not my local post office?) But UPS was still updating its whereabouts. Then on the day it was supposed to be delivered to me it said I wasn’t there(but I was) and on the UPS tracking they said usps attempted and left a notice BUT THERE WASN’T ANY NOTICE. My shipping address is correct. NOW it says its at my “local” post office IN HIALEAH. I just need to know how do I track it down? Do I call my local post office which is on Miami beach? Or the ones in Hialeah? There are a lot in Hialeah. And what do I say? They didn’t even leave a notice. I’ve never done this before.