Good to see that someone recognizes the struggle. We faced the same struggle with our son. I was not satisfied with the wait and see approach and went outside the school system for assessment. We were very fortunate to have an awesome psychologist and paediatrician on our side.  I worked long and hard with him and was his strongest advocate. I never took no for an answer. I know sometimes teachers and school staff are stretched pretty thin but that is something our government needs to recognize. I couldn't let my very intelligent, capable child fall through the cracks because schools are short staffed. He deserved the same chance at an education as all of his peers. 
When my son reached high school, he had become his own biggest advocate and he found some very great teachers who recognized his potential. He graduated high school with honours and he is now a successful university student , who talks about pursuing a career in medicine! Good luck to all the other families struggling.