Help needed

Hi everyone - my granddaughter is 8 years of age and we are fairly certain she has autism.  My daughter is currently going through the assessment process with her.  Her primary school was not overly supportive of previous issues with other children so my daughter made the decision to move school and she has been attending the new school for nearly 2 weeks now.  it is HORRENDOUS each morning trying to get her dressed and out of the door (crying, hiding under the bed, having to be dressed by parents etc, etc).  The new school have been totally amazing and extremely supportive but my daughter is at total breaking point and just wants to send her back to the old school as the child was happy there.  The move was made for long term support.  Any advice / support would be really gratefully received.  Thank you.