If your account is blocked on NEST (usually because you typed your password incorrectly multiple times), you can reset it without the assistance of Upstox. Generally, you will see a screen like below:
Click on Forgot Password on the Logon screen
On the screen, enter your UCC ID (6 digit code), registered email address, your date of birth (dd/mm/yyyy), and PAN card number
You should get a confirmation message on your NEST terminal that your account has been reset
Go to your registered email address’ inbox and you should see an email from firstname.lastname@example.org with a new login and transaction password.