My phone is unresponsive

I had this iphone 5c for about 2 years and today i dropped it and it landed on its back. The screen went black and wont display anything. I tried useing the trick where you hold the home and power button, but it didnt work. I tried to connect my phone to my computer but nothing shows upon my computer, but my computer does make a sound when i plug it in and out. I kind of feel some heat in my phone. TOday i just tried to connect it to itunes and itunes recognizes it but i can do anything on itunes with it. My phone makes no noise anymore and I dont know how to fix this issue, like what do i need to buy.