We are only able to amend the shipping address and the shipping method once an order has been placed.
Whether we are able to take action depends on the time you placed the order and its status, it may be possible to amend if we are able to intercept it before the item/s are packaged.
Although we cannot guarantee an amendment until we have investigated, please do get in contact with our Customer Team HERE to see if we are able to do this for you.