screen cracked and phone wont turn on

I have had this iphone for about 2 years and I have had the screen replaced 3 times. Recently I dropped it and my phone had been dying on like 50% but today for some reason it wont turn on. The screen is completely black, I’m not receiving messages, the apple emoji wont come on and neither does the dead battery visual. And when I tried to connect it to my Pc Itunes didnt recognize my device.. What should I do?