Returning item outside return window

[migaloo108]

Hi,
I purchased a faulty item and the seller said I could return it but it is after the return window which says it is closed. 
The seller is not responding to my messages and I can't find any way of escalating this to ebay.

How can I contact ebay via email or phone?
Any ideas?

thanks.

[lady_madonna]

@migaloo108 

You cannot escalate this to Ebay if the return window has been closed.