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 Trader terminal that your account has been reset
Go to your registered email address' inbox and you should see an email from email@example.com with a new login password.
Get more information about Trading Platforms at Upstox Knowledge base.