When you have won an item you will receive an email telling you what item you have won. You must then log into zeecreate and look at your 'won items' page in the member's area under the 'buying' tag. Here you will be able to pay for your item. Once you have paid you should send a message to the seller stating the address that you would like to have the item sent to. This can be done through the message board on the 'won items' tag.
Buying an item is easy but make sure you read all the emails you receive to make sure you keep in contact with the supplier.