Suing the father for discrimination between kids of different wives

Hi,

I’m 19 years old from the UAE. My parents are divorced and my father is married to a 2nd wife. He has 7 children with her.

So basically back then when I was 14, my dad opened a bank account for my stepbrothers and stepsisters providing them 1500 monthly but not me.

He recently bought my stepsister a german car and provided me with a very low budget. He also owns a company which he hired all of my biological sisters and my stepsister which is also 19.

So my question is can I file a case against him? And if yes, what would be the outcome?