How to reach Ebay support when Seller won't respond to refund request

[maxrpm_1]

I purchased a defective computer mouse. Seller doesn't respond to message request for refund. Ebay says it's beyond Seller refund window ( sent messages regarding issue within 30 days) so I tried to get to Ebay guaranty process for defective merchandise, no luck on finding a way to communicate with Ebay. 

Can anyone suggest a method for getting to a human/Ebay to remedy this problem.

[fab_finds4u]

Sending messages within 30 days doesn't count. By 30 days you needed to hit the blue button "Return this item" which opens a case. The seller then has 3 days to provide a return label or a refund. If they don't  you go back to the case and ask eBay for help. 

If time has expired eBay won't help.

If you paid with PayPal go there and file a dispute or file a chargeback with your credit card.

[maxrpm_1]

Thx for the response, what about the 'Ebay Guarantee' against defective products?