Hello Madhumadhu.

It was officially mentioned that the payment date is from 22.8.19. So I would suggest you to kindly wait till the mentioned date. If you want to pay now you can enter your Ticket and proceed but I would suggest you to wait till the earlier notified date. If not, you can try to contact the officials through email. The email id is provided in the official site. Email them your query and they will reach out to you soon.

Hope it helps you.