Windows 8 store stuck on "payment and billing" screen

[AWS]

I bought this computer today, with windows 8 (not a upgrade). I tried to put a payment option (Settings of the windows store) on my account unsuccessfully because of the region issue. I checked it up on the internet and fixed it. afterwards I tried
to add a payment option and now It's stuck in an endless loop of &quotPayment and Billing&quot.
I tried to turn off windows firewall, and McAfee with no success.
What should I do?


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