Hello @Rachal37_
Thanks for reaching out here in the Community.
We would recommend checking first the email address linked to your Roku device. To do this, go to Settings > System > About. Once done, log in to the same email address on our website then try updating your PIN.
If you need help on how to update your PIN, visit this Support link: How to create, reset, find, or delete your PIN for your Roku account
Let us know how it goes!
All the best,
Kariza
Kariza D.
Roku Forum Moderator