Help needed cleaning up model

I’m trying to model a knight chess piece however during the process I believe I have messed up somewhere and can’t quite get the shape of the face or the ears right.

This is the reference image:

This is what it currently looks like:

You can get the file here:

knight.blend (619 KB)

Your help with this would be most appreciated as I’d love to finish this model but I think I’ve gone wrong :confused:

I remade a simpler base by retopo your model, so you can use it to multires sculpt (just remember to close the bottom that i left open like you did on your mesh) :

(on the 1st layer there’s your previous model that i applied a mirror to)