Hi I'm shipping iTunes and tell me you can not buy please solve my problem

Hello nabaa16,

Thank you for using Apple Support Communities!

I understand from your post that you are receiving a message saying, "Your Purchase Cannot Be Completed For Assistance, contact iTunes Support at www.apple.com/support/itunes/ww/." In a situation like this you will need to speak with iTunes Support. They can be reached by clicking the following link and selecting "Talk to us":

Contact - Official Apple Support

Best Regards.