You go to the imigration department to cancel her visa, from the date of cancellation she has seven days to exit the country.. Just drop her to the airport thats more than enough.. Once visa is cancelled go and apply for a new one.. Just remember to keep her passport copy, ticket copy and the cancellation paper with you.. If you feel she did not get on the plane you can go to the CID department and file an absconding report against her with those copies..