Ariss Info Tech — not paid for the which I done for them

I got a call from divya ([protected]), as she mention that she is from ariss info tech and she asked me that whether i'm interested in data entry work. And she clearly said that there is no need to pay any fee to us. Got a mail from divya. [protected]@gmail.com with the work details. As i completed in a single day and sent back my work to her. They have take the details for the payment. But today they have asked me to pay the fee. Its not fair. Can you please help me?