Welcome to the community
If you were charged for calls even though you have the option, it is most likely because you went over your minutes. You can see the details of your calls on your bill and add up the calls to see how many minutes you've used.
To make sure it doesn't happen again next month, you can track your usage on the MyAccount App.
Did you try to add up all the minutes made to India to verify if this went over the 1000 minutes?
If you still have an issue when doing this, you can contact us here or we can send you a private message in the community.
Let us know!