For a request like this, the best place to start is your diocese of Coimbatore.
Diocese of Coimbatore
If you have a friend in a similar situation who does not know their diocese, they can look up their diocesan website up at Catholic Hierarchy.
We have no contact with the Holy Father or any Vatican officials. If you have no luck there, the best I can do is recommend trying to contact the Vatican through our Where do I write page:
do I write? — Vatican Mailing
Sorry, that's the best I can do.