Why aren't my orders to the USA being charged shipping when I have international shipping set u

My country is UK. My shipping levels include My country, European Union and International.
Shipping is not being charged on orders to USA. Losing me money. Please tell me what setting I have/haven't done correctly. Urgently please. Orders are coming in thick and fast!
Ps - how do I access support from my dashboard without being forced to "Upgrade"?