Lorraine
My understanding is that GPs are contractually required to complete an ESA113 although I doubt that they are chastised when they don't.
As it is not your normal GP looking at the form then it may well be to your advantage that they have refused, a bad or indifferent report will certainly be a lot worse than no report at all.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems