"My son and camhs"

I have a son with aspergus, another with year old with asc who was diagnosed a couple of years ago. my other son old is the same as his 2 brothers I went to our gp who sent a referal to community camhs who sent us to camhs. I was told my sons behavior was down to me and asked if I had a social worker when I said I don't she informed me I would have by the end of the week. I feel so let down camhs have now said they will arrange another appointment with someone else. my son scored 32/40 for autism yet I was blamed