Hello Prabhjeetsingh,
Welcome to the community!
Firstly, you should note that this forum is community-driven and not intended as a venue for customer services. We do not have access to customers' accounts. If you would like to discuss specific matters, you would need to contact customer service. In addition, they can also be contacted via Live Chat, Facebook, or Twitter. Those methods can be accessed via the contact page posted above.
That said, you should be able to retrieve your personal unblocking key (PUK) via your My Account --> View usage & manage. From your Dashboard, the option to Retrieve your PUK code is near the bottom under Quick Actions.
Hope this helps 😀
Cheers
