I Can't buy anything from the xbox store

What is the error code message that you are getting? and have you tried hard rebooting your Xbox?

Your best option would be to contact support. https://support.xbox.com/en-US/browse/billing

Have you tried power cycling your console by holding the power button in until it turns off?

Hey there SalahMess

Thanks for reaching out to the Forums for advice on how to hopefully regain your ability to purchase things. I can totally understand how this could be pretty frustrating/concerning. Seeing as this problem has to do with your payment instrument, I suggest
actually getting in contact with
customer support so that an agent can help perhaps get to the bottom of this.

When you get the chance, give that a shot and let us know how that helped.

Thanks!

You entered the billing address could be the problem. https://support.xbox.com/billing/payment-and-purchases/manage-payment-options-on-xbox-one