Purchase not completed go to www.apple.com/support/iTunes'/com

This is not something you can get resolved over this forum, as Apple needs to speak with you directly to resolve.

You have to contact iTunes support by using this link:

www.apple.com/support/itunes/ww

or contact apple care at:

Contact Apple for support and service - Apple Support

Good luck!

This is primarily a user-to-user support forum; other Apple users like you. Click on: iTunes - Official Apple Support