[Resolved]  Exa Technology — asking to pay the money

Hi sir,
I was in need of part time job so i applied for it. Later i got a call from exa company to fill the 15000 captchas for 15 days. As i was in need of money i accepted it but later i told them that i really dont want to do this as i am employeed now and couldnt get a time complete filling the captchas and my work at a time. But yesterday i got a mail from that company to pay the utility charges. I dont know what is this utility charges means and the company messaged me today (29/04/2019) that the comapny will file a case for not fulfilling the agreement. I am not knowing what to do. Please help me out of this.