I've dropped my iphone 5c on the ground and the screen is mostly black?

I dropped my iphone on the ground and I can't see most of the screen. I still get notifications. It's still able to charge. The part I can touch is still working but I still can't use my phone because the part that's lit up is so little. Can I just get a screen replacement? When I turn it on it looks like there's a big crack but when it's off it's gone. Your help is appreciated.

My yourself a new phone.

Take it to a phone shop and ask.
Surviving being dropped is not in their design brief.
Put your next one in an Oyster Box or at the very least one of those semi-soft skins which come just up around the edge of the screen.