Front facing camera not working

I have replaced the battery in my iPhone 5c and after the repair my front facing camera isn't working, the strange thing is that when I flip to the front facing camera in the camera app it brings up the animation of the camera flipping around and shows a still picture of the last thing the back camera saw (if that makes sense) then I scroll to the 'square' photo filter and it displays the back camera but the image is sideways?

If anyone has a solution or has heard of this type of behaviour before please let me know :)