لا استطيع اكمال عملية الشراء من خلال بطاقة ايتونز

1.

Based on your scrrenshot, you do have funds in your Apple ID balance.

See -> Add a payment method to your Apple ID

Add a payment method to your Apple ID – Apple Support (UK)

• if you use your Apple ID balance, you need to set your Apple ID balance as your default payment.

If you update your payment method or add funds to your Apple ID balance, It would take about 1 to 3 business days in order to process.

If you're still unable to update your payment method, Contact Apple Support.

2.

If you have performed the above, the message >Your purchase could not be completed< will disappear.

You get the message -> Your purchase could not be completed, because you need to update your payment method or add a new one. 

• If you want to change your card, add first the new card, then remove the old one.
• or if you use your Apple ID balance, you need to set your Apple ID balance as your default payment.

Click here for more support and assistance.