What can I do about this?
What have you done about it? Have you opened an item not as described case under eBay's guarantee? That's the way to get a refund, not by messaging the seller.
If you're still within the 30 day time limit to open a case you can open one now, see: https://pages.ebay.co.uk/ebay-money-back-guarantee/
If it's beyond the 30 day time limit your payment provider e.g. credit or debit card issuer may be able to help.
By the way, we are not eBay. We're just other users like yourself.
