I have purched a computer from an internet website and they are saying i need to pay more money to them so customs will release my order can anyone help me on why they want me to pay that i have bought stuff from china befor on the internet and never had to pay any extra for this i have always just paid for the item and the shipping and insurance but now they are asking for more money i just dont understand this now after buying over 100 items that have never had any trouble