moving schools or flexi-schooling

Hi everyone, i would really appreciate any advice you could give me. I am at breaking point. my daughter who is nearly 8 yrs old (diagnosed with ASD at 5) is really struggling at school. this is her first year in junior school and as the workload has incresed her modd and temper have. Before the start of the term i applied for a chage of school to another local school which is still mainstream but has specialist teachers working ther too. In September i was told my daughter would not be able to move until january which i thought was an excessive amount of time to handle this, Now after several meetings at the school about what they can do to help my daughter cope better i have been told she will not be moving in january as they do not have enough time to arrange her new 1:1. I am furious at this i really need advice, i have spoken to parent partnership but i feel there is some reason unknown to me why this is purposely being held up. My main concern is my daughters happiness and then her education and at the moment she is receiving neither as she is too distraught/angry to take part in lessons. she has always been more intelligent than her peers and was reading fluently at age 4. she has each year been performing a little worse and is now below her peers in some areas. I feel the school are not meeting her needs but dont know how to handle this at a higher level than the headmistress.

sorry for the long thread i wanted to put as much info in as possible

thank you

Emma