My iPhone 5c screen doesn't work but the phone still does, what should I do?

I recently got an iPhone 5c about three weeks ago. A few days ago I left it on top of my car on accident and drove away, the phone fell on the road and got cracked badly. However when I plugged it in the charger it started making its regular noises as if it still works. However I can't see anything on the screen, I can also hear people texting me. Does anyone know what I should do? Should I try to get the screen replaced, is there a warranty on it that allows me to get a new one, or should I just try to get a new phone? Or any other ideas?

You will have to get the screen replaced. They will not pay for your negligence.