Problem with purchasing some T shirts.

[Hoekie]

I joined the Registry store and would like to purchase some T shirts.
I have added them to my cart but when I want to get a estimate for shipping I dont get a estimate! If I try to check out I get a note saying my billing address and my credit card address dont match, although I want to pay with Paypal as I stay in South Africa.
Can you please help?

Thanks