i don't understand why i cannot purchase anything using my Mastercard. Each time i enter the card expiry date, it will show an error.

Last time i usually pay the purchasing item using my debit visa card.

after that i no more use the debit visa card.

i'm using mastercard.

now each time i want to purchase anything, i cannot pay using the mastercard.

when i insert all the details including the expiry date, apple will show an error. only the expiry date.

i don't understand why.