Yes. We will refund your unused balance via paypal. If you have Business or Premier account you will have to bear the paypal transaction fees.
Simply Login to your account, Goto My Billing >> Request Refund. We will get an email and will process your refund in 24 hrs.

Check the following link on how to modify Nameservers http://cp.pubdomains.in/kb/servlet/KBServlet/faq455.html

Are you getting this error when pushing or transferring the domains ?
[7] Error Message: <domain Name> cannot be moved to another Customers account as the associated Domain Registration service is currently under the Money Back period.
You can transfer the domains on 5th Day from registering. We have a money back period of 4 days and during this time you may cancel your domain registration for a small charge. Usually its $1 to cancel the registration but it may vary depending upon the TLD.

This is a temporary error and it will clear off on its own in 2-3 hrs.  Usually this occurs when there is more load on the system and the order are queued during processing.

Pushing domain to another Pubdomains.in accounts is extremely easy and instant.
Get the customer username (e-mail) and Customer # of the new contact and after logging into your Pubdomains.in account
Select the domain you want to move and then select “Move Services”
You can check the details on link below
http://cp.pubdomains.in/kb/servlet/KBServlet/faq450.html
You can move the domains to any of the resellerclub resellers for free using the above method.