well fine!

Now you can see your mail, sms on mobile which was registered.

definitely they will send mail.

if not then refer helpline through mail them:

India Habitat Centre, Core 6A, 1st Floor,
Lodhi Road, New Delhi-110003 India
Specific Query related to NATA-2018 Examination
Email: info.tcsionhub@tcs.com

Hi,

Don't worry!! If the payment is not succeeded you will get an message. Now if you are not getting confirmation page then may be the server is down or any error is occured. Try to login after few hours and check the payment status.

All the best!!