How can I get help from ebay when the seller says that the wrong item delivered was due to ebay?

[kippercojones]

The wrong item was delivered to me, the seller says they posted the correct item and that the mistake was made at ebay's hub. How can I get hold of someone from ebay to address this?

[**peaseblossom**]

Regardless of the reason you still open a return on here:
https://www.ebay.co.uk/help/buying/returns-refunds/return-item-refund?id=4041
select "Doesn't match description" and if necessary escalate it to eBay after 3 complete working days. 

[papso22]

If this was a global shipping item you as the buyer just open a case for item not as described in the normal way.  The seller has to then put their case to ebay.