Parade Shoes...

Probably in the wrong forum, and probably a stupid question but...

My parade shoes are killing my feet. Every bastard time I walk/march in them for more than half an hour I end up with blisters covering nearly the whole of the bottom of my foot, and a lovely cut in the top of my foot where the toecap bends when I take a step.

Any ideas, other than put up with it until I've adjusted?
The only advice i can give is man up. are you in the RAf or something? Seriously thouh, the docs should authorise you new shoes. Go and see him.