Are you actually being charged for it or is it just telling you that it's enabled? The two are available for use together. Are you close to the Mexican border or something if you're sure you're getting charged for it too?
@Ann Rokeby, When you added the easyroam service (by text?) it will automatically add easyroam for both US and international destinations. They are just add-on for Koodo billing system. You are only charged when your actually roam (either US or international)