Call 1 800-345-7669 pick option 5. Wait about 25 minutes. Then tell them you want a refund for the expansion pack you purchased. Make sure to argue that in fact you have not downloaded HoW yet there for you have not taken ownership of the item and is entitled for a refund even if partial (if you both both packs at once) Don't give up, they will give you account credit. Ask for a supervisor and if necessary to be transfered back to the USA. Remember that you did not download the pack and all pre orders can be refunded.