We appreciate you trying changing the region DaveWillis1. We are sorry that when calling your wife, it assumed you were making an international call. We can certainly understand your concerns about this due to the charges that could have appeared on your bill if you had not had your spend cap in place. We do have a work around which may help. Please could you try the below.
Select Settings from the Home Screen
Select Mobile Data
Select SIM Applications
Select Roaming
Select Select Mode
Select Manual
Select National
Please let us know if this has worked.
Kind regards Jodi.