The expiry date wouldn't be 04/17 by any chance? Perhaps try calling the bank just to check it hasn't been locked for some other reason (some supicious overseas transaction might cause bank staff to lock cards before they can tell you)
Hey jessie1997 - we'd need to take a closer look into this. If you could please click → here and our Live Chat Pre Paid team will be able to look into this further. Let me know how you go?