We have had XM Radio for several years, 1 car and a potable unit. I paid to continue service through 12/31/10 on both radios. We sold one car in February and forgot to cancel. Big mistake! Received bill for continued service in Dec 2010, ignored because we no longer used portable unit and didn't have service in the new car. I called and canceled service on 1/6/2011. Then the calls started, sometimes 10 A DAY! Then calls from a collection agency! Called XM and they said we owed $28.32! After being transferred around and no answers (they... read full review »