2nd dose vaccine in India
Now you can choose your 2nd dose date for :
Covaxin : 28-42 days
Or
Covishield : 28-56 days more
As to what you can do now that your vaccinated status shows cancelled, I'm sure clarifications will come.
Since your 1st dose date was 8th March, 29th day would fall on 6th April.
You could try again then. more
Someone from Local circles who's in touch with concerned authorities may plz ascertain & post clarification more