Cannot contact seller to request refund, how do I repeal with eBay directly?

[shulman04]

See subject line, please only respond with answers directing me to the right page to communicate with eBay so they can step in.

[eburtonlab]

First you need to open a case for a valid reason -- for instance if the item has not arrived, or you want to return the item for a refund.

https://www.ebay.com/help/buying/resolving-issues-sellers/report-issue-seller?id=4022

If the seller is required to accept a return and refund you but the seller does not, then you can ask eBay to step in after the appropriate interval.

https://www.ebay.com/help/buying/default/ask-ebay-to-step-in?id=4701

If you provide some details of the situation, someone may be able to suggest which sort of case you need to open.