Appealing PIP decision

My son (16) has ASD and ADHD.  We found out today that he has scored zero on every element of the PIP application which means no PIP and DLA stopping.  

They appear to have not listened to a word we said at the face-to-face meeting or to anything written on the application form.  

I intend to ask ask them to ‘review the decision’ but was wondering if anyone out there had had a similar experience and whether they had any luck with the review.

Thanks