Refer a friend to buy a car

I refered convinced my sister to buy hyndai venue coz she wanted a renault and I was told that I will get R2000 voucher. O received an email saying that shpyld she purchase a car I will get the voucher and that the referal has been submitted. Today they told me different story they said I submitted late so I wont get the voucher yet no one told me about that. I am very disappointed at Hyundai and very angry I will never ever refer anyone. Worse part is the person wanted a renault and I managed to convinced to purchase a hyndai venue. I didnt know that you guys dont mean what you say.