TopBet is a ****

I received a call from TopBet agent saying I've won a predictor game and they are going to create a topbet account for me to access the funds, I did everything including FICA, I used the voucher and won, doubling my winning in one day, I requested a withdrawal, they said in 24 hrs, I call them today to withdraw, they tell me I have to wager my winnings 3 times before withdrawing, then I will get the money. Why can't they give me my winnings, this is a ****, South Africans, TopBet is a ****.