There's a simple process you have to go through, by calling these helpline numbers:

8499861703 and 9100718007

which are mentioned on the official website*

You have to call them and tell your name along with your registered mobile number after that they will tell your registration number.

Hai zeba you can download the contact us portal in the website take the number and call to them ask to give details or go to the internet shop he/she will the guidelines.