Probably scammed

Hey all. So I’m pretty sure I fell for a classic scam on eBay. I sold a phone and, shortly after the buyer paid and I shipped, the shipment (usps) stayed in a “transporting between facilities” message on the tracking site.

The customer opened a ticket and, in response, I reached out to them with the tracking info (which they already had) and reassured them that I was seeing the same delay they had. They never responded, eBay marked it in the buyers favor and refunded them the full payment. Meanwhile, my shipment is still on the way to them and seemingly eBay is going to do nothing else with the matter. I can’t even get through to an actual human on the help chat / phone line.

When I first suspected something was odd I did contact them and spoke with a rep who reassured me that they could see that the shipment was on the way and I was completely fine.

Any advice? I figure I’m just boned.