E-nps — unable to make payment after registration

Address:	namani, 781036
Website:	[email protected]

I am unable to make my first payment after registration of e-nps, whenever i am trying to make payment the system is showing message — "registration against this acknowledgement id is pending for confirmation from payment gateway. Please try again after sometime." please help.
My acknowlegment no.[protected]
Date of registration -04.02.2019
Dob-08.02.1993