why decline my payment
why my payment method is declined
Apple Event: May 7th at 7 am PT
why my payment method is declined
In addition to the link provided by lafeef:
A “payment declined” or “card declined" message means that the issuer of the credit or debit card you have on file in your iTunes account rejected a charge or account confirmation. It is not an Apple problem; Apple is just passing through the message from your issuer. There are a number of reasons the charge or verification might be declined:
why decline my payment