sir,plz help me. i have mistaken my name in basic registration.I also filled final registration and also done payment.Can i correct my name?

Once you complete the basic registration, the correction window opens and that is your only chance at correcting the errors in the application form. Once the basic registration is accepted and you proceed to final registration process, make the payment and click on 'Submit' you actually seal the data you have entered. Thereafter, what you typed in there, stays there. And no corrections are allowed and can happen. So unfortunately you cannot make any changes to your application.