eBay

How do I navigate around post-transaction case so the seller can issue me my refund of the seller has told me they have tried to refund me but can not because of post-transaction case exist on the order and seller refund can't be triggered

eBay have lost me £14.99p because of a order I made 13/11/2020 the item was meant arrive on either the 17/11/2020 or 18/11/2020 and never arrived on either of those days , on the 19/11/2020 I contacted the seller and asked what the delay was they bla...