When I bought two tickets to the Kennedy space center and two tickets for the space shuttle launch. All the tickets were $38 a piece. Well I found out now, that the two tickets for the space shuttle launch included admission into the visitor center. So now I have two extra tickets that I can't use at $38 a piece. but the website says it is nonrefundable. I thought about disputing it on my credit card. Is it possible on "nonrefundable" charges? If I called the ticket center, would they refund me the two extra tickets?