Need help

I need help,there is someone who caught me off guard when I was desperately in need of money and I used my last savings with hope that this person will help me. She said she works for Luno and they help people invest and trade then they get 10 percent out of the profit I will make. I made a first deposit to activate the account and a second one to get my profit now they saying I have to deposit another money to get my profit. Her name is Rochelle Wellstone