We had the same for years. I got so fed up 18 months ago, after yet another fob off from the silly cow of a paed we'd been referred to twice. I was told I was an over anxious mother and there was no way my daughter was autistic, all from a 10 minute 'assessment' - I say that very loosely!
So I went to another member of the team, that I'd had good dealings with previously and seemed to be thinking similar to me. He referred our case to the head of service for the paeds. Eventually, after 4 months he referred us to the best psychologist in our area. We had to wait 6 months nearly to see her, but boy it was worth the wait!
Six months of intensive assessment, several 3 hour meetings etc, and we got a diagnosis of ASD (Aspergers)! The woman we were referred to has been amazing, and didn't just look at our daughter, but looked at us and how it was all impacting on us individually, as a couple and as a family. She was also instrumental in hubby getting his ASD diagnosis one week after our daughter got hers!
So, my advice is to def complain. Do not accept what you are told if you truly believe there is more to it. You know your child best, and live with them everyday. Trust your instincts. Good luck!