You may still receive the item but if not you can try a case with eBay to get your money back.   Wait until after the estimated delivery date on the listing then select "Report an item you didn't receive" on here:
https://www.ebay.co.uk/help/buying/returns-items-not-received-refunds-buyers/get-help-item-hasnt-arr...

That has to be started within 30 days.   Escalate it 3 complete working days later to get a refund.

If the item is not on your purchases list you won't be able to open a case on ebay.  You will need to contact your payment provider within 120 days and ask about a refund or chargeback.