Thank you for the positive rating. I note that your new questions are still appearing on this thread rather than a new question being posted. I am not sure that one question isnt suppose to run indefinatley into lots of different areas and I would be grateful if you could consider posing further questions.
From your description - if you son is failing to engage with both yourself and the SW then he needs help and assistance in dealing with his feelings. Each LA has different support groups in different areas so it is best to ask the SW what is available. Counselling is a start. Lots of schools have in house counsellors so maybe that could be a start. A support worker could also assist your son with life story work - this might help. If you are concerned about your sons presentation and the SW is also then consideration does need to be given the LA as to what help can be offered to him.
Did he give an undertaking?
An undertaking is a promise to the court.
In any event if he doesnt pay, then return matters to court to seek to enforce.