Q: iPhone SE back camera doesn't work and screen smashed

I Accidentally dropped my iPhone SE causing the screen to smash however the back camera has also stopped working and only provides a blank black screen. From other research online I think a wire may have come loose in the fall. I've restarted the phone and the problem persisted therefore im certain it is a hardware issue and not caused by the software. Is there any other possible causes and how much would it cost to be repaired?