I assume you have already discussed the issue with the seller, are not happy with his response, so you are ordering him to give you a refund. However, only very few sellers come here regularly, so it is highly unlikely your seller will see your post, let alone do what you request.
If you think you are entitled to a refund and the seller is not helping, open a case and don't let the deadline expire.
If you want to talk to eBay, you have to start a live chat session from the help page, as they don't read here either.
This is a member-to-member forum to ask for advice when there is a problem, but in practical terms members here cannot help you with refunds.
