When you reach a page where the gateway will be asking for your credit card and address details, toward the very top of that form should be a choice to select either COUNTRY or CURRENCY. The default is United States or American Dollars.
Some people interpret this to be the currency or country you are paying into, but they actually want you to select your own currency or your own country.
When you have this selection made appropriate to your country/currency, then the choice beneath for specifics that relate to your country will be available. For example if you select CANADIAN above, you will see Province instead of State.