I have to deal with a few of these through work, sadly we can't directly help people but this is the advice we give people:
Parents should follow the appeals procedure as set out by the Local Authority, details of which are sent with the school allocation letters. You can find further information on Bolton Council's website or by ringing Pupil & Student Services on 01204 332118. Advice on appeals is also given by the Advisory Centre for Education (ACE) who can be contacted on 0808 800 5793. There is also some step-by-step advice on the DirectGov website
Hope that helps.