Expiry of Show cause notice

Arpit (Student) (141 Points)

20 October 2022  
Hello experts,

One of my client was not able to file it's GST returns due to financial crunch and he received SCN for cancellation of GST registration. But he didn't see that and now the time of replying to the SCN has expired.
Returns of 3 months have not been filed.
What should be done?
Kindly guide me on the course of action to be taken.
Thank you.