Honda Civic 2013 - Key lock?

So I got into an accident back in August. Before that the actual keys (NOT THE REMOTE) worked fine. But after the accident, the rear driver side door had to be replaced completely. I, like most people, don't really use the actual key to get in/out of my car. I use the remote. But I was wondering what I can do to get the actual key fixed/programmed properly? Should I go back to the dealership and ask them to fix it? If so, any idea how much that would cost? Any suggestions would be helpful!

Take it back to the body shop that fixed it and see if they will fix it. That should of been done when they replaced the door…

Surely the rear door doesn't have a lock in it anyway, so I'm not sure why your key's wouldn't work now?