I have purchased an item and need to change the shipping address. How do I contact ebay to change?

[2gbz]

I have purchased an item and need to change the shipping address. How do I contact ebay to change?

My seller has also given me a ref number.

[nudibranch4569]

have you already paid for it?on your purchase page you can change the address for this purchase only if you wish.,its under shipping address.