AGENCY THAT DOESNT PAY THEIR MODELS

I was approach by a modeling agency who i had an agreement with . who would send me to castings for tv adverts and i would put them as my representative . So that when i book the adverts and get paid i get paid through the agency and they also gets her cut for getting me the castings. Ive gone to two castings for this agency and booked and done two adverts in 2018 the agency has already been paid for both adverts last year already and still haven't paid me . Every time i ask for payment excuses are always made yet all the models from other agencies that did the adverts with me were paid by their agencies last year .