You dont need to talk to ebay.
if the item does not arrive then you open a Not received dispute one day after the latest estimated day of delivery on the listing. The seller should refund but if they do not then you go back to the dispute after 4 days and escalate to ebay who will force the refund.
It is all automated
See the ebay money back guaratnee
You dont need to deal the seller
https://pages.ebay.co.uk/ebay-money-back-guarantee/
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