Abey this is the applying procedure in NPAT:

How to Apply:

Step 1 - Click on Register and create your account. Remember to keep your 10th Roll Number handy.

Step 2 - Go to your mailbox and verify

Step 3 – Login with your username and password and complete your application form.

Step 4 – Make an online payment of the registration fee

Payment options are done by credit/debit card /Net Banking /PayU. You will need to make sure that your credit/debit card or whichever bank you are using is valid in the list of banks given. And if you are still not able to do it then tell me what exact error is coming while doing payment then maybe I will be able to help you in a better way.

If you still have any problem you can take a screenshot of the error and mail at their official webmail that might help you to resolve your problem.

Feel free to ask if you have any more queries. All the best!!

I would suggest you to go through with the given below link & follow the steps to fill NPAT BBA Application form.

NPAT BBA Application form

Good Luck!