The problem is that I was charged for a long distance call even though I have a Canada wide plan. What's weird is that the call I was charged for,is in my own city. I don't understand how it could have been charged as long distance.
Are you sure it is billed as long distance and not extra airtime?
If it is indeed LD, did it happen on the same day as a plan change?
If it did, it's still an error, but that's probably why it happened.