My wife and I moved from Canada to the USA about 6 months ago. We closed our cell phone plan and paid off the balance (or so we thought). We just got a call from a collection agency telling us that we have $300+ of outstanding debt. I have no interest in spending any more time on the phone talking to the cell phone company and would prefer to just ignore it. They had my wife's Canadian social insurance # on file, which we don't care about. Is there any chance this could somehow affect her US credit? Anyone have experience? Thanks!