She won the ruling but the tribunal did not set compensation at that time (which I think is standard?). Maya has been negotiating with her ex-employer, the Centre for Global Development, but has not been offered an amount she thinks suitable (the higher the amount she gets, the more concerned other employers will be about making the same “mistake”).
If the two sides cannot come to an agreement Maya can ask the tribunal to make a ruling, to do that she will want good legal representation again. Hence she’s asking for more money.