Refusing admission to a French school due to the nationality of the child

Hello,

My child has been refused admission to a French school in Dubai, two years in a row, in Pre-KG (first-class) where all nationalities can apply, because he is a Saudi citizen and the school gives priority to French and Emirates citizens.

The director clearly says it is based on nationality because this year we were amongst the first ones to apply.

The UAE government does not differentiate between UAE citizens and GCC citizens (Saudis) giving them free education in public schools to be non-discriminatory between locals and GCC citizens.

KHDA regulating private schools can speak to the school but cannot enforce the admission because it is the school's internal policy.

How is it possible to be bluntly discriminated against two years in a row? Can we legally sue the school for being discriminatory and also can an internal policy be contradictory to government laws/constitutional laws etc?

Thank you!