Hey hrd9703,
We understand that you believe you were charged for an international call, but were using FaceTime video. We'd be happy to point you in the best direction for support.
If you have any questions regarding charges received by your wireless carrier, you'll need to reach out to them directly for support, as this is a user forum and nobody here will have the ability to provide any kind of billing support for your carrier.
They'll be best equipped to assist you with determining what the charge was for and the reason for it.
Thanks for using Apple Support Communities.
Have a great rest of your day!