The application fee in the form for CET law to be paid shows as 0 but it shows a 0 in the print as the fees paid too. What should I do?

The website says it will provide a receipt duly signed by officer but after I filled up the app form, a text came stating "your application has been confirmed" Does this mean that my application has been duly received or not? Because the printout says fee paid 0. I appeared for CET law.