Can't update to OSX Mavericks because I never used my Apple Id account in App store?

Hi there,

I have a bit troubles to upgrade to OSX Mavericks.

I can open my App Store, go to upgrades, and I can purchase the OSX Mavericks for free: "Free update".

When I click the Free Update I have to log in with my Apple Id, which I created a long time ago, but I never used it to buy something.

So, when I log in with my Apple ID it says, 'This Apple ID has not been used in the App Store, Check your account information'.

I can than 'Cancel' or 'Review', but when I cancel nothing happens, and if I click Review I have to set up the way which I want to pay something (Visa).

But I don't have any credit card, so is there anyway I can install OSX Mavericks without filling in credit card numbers and details?

I don't want to buy anything ever in the App Store, but I want my free update if it's there.

Please help me.

Greetz