Why app store doesnt accept my visa card ?
MY visa was fine, then suddenly it said billing problemand i coundnt uptadae anything because it doesnt accept my visa details anymore and i cant understand why !
Are you in a different country then the one you used previously with your AppleID? The country of the Apple Store you are trying to buy from and the billing address of your AppleID and the country you are in must match.
Also, your VISA card may have been disabled by Apple for security reasons.
Then you have to contact Apple Support. Only the Account Security Team can activate it again. See this webpage on how to contact Apple Support in your country: There are either telephone numbers given or an email form:
Apple ID: Contacting Apple for help with Apple ID account security
Explain, that you need help with an account security problem.
You can also try to email the iTunes Support using this form:
https://ssl.apple.com/emea/support/itunes/contact.html
And contact your Bank as well.