Time for an update, and it’s good news.
after PayPal found in favour of the seller, I again emailed the Uk MD of eBay, we got an email back today saying that they could see we had provided everything and as a gesture of goodwill they are giving us a full refund.
They did say that normally it’s not a good idea to open a Paypal case until the eBay one has concluded as PayPal are their financial arm and they normally won’t override a Paypal decision, I had just assumed that opening a paypal case would help, but obviously not.
By the wording I get the impression that the seller is not paying the refund, as they were very clear that this is not normally something they do.
Main thing is we are getting our money back, hopefully Karma will visit on the seller in some way.
Thank you for all the suggestions and ideas.