I had an ebay transaction where I sold a piece of equipment, and the buyer was shopping around and didn't want to keep my product despite listing it as "no refu

I had an ebay transaction where I sold a piece of equipment, and the buyer was shopping around and didn't want to keep my product despite listing it as "no refunds." The buyer claimed the product was defective and they allowed him to ship it back at my expense. I told ebay that I tried to help the buyer resolve any issues and they didn't even bother dealing with it and just closer the dispute. I called them and they claimed I agreed with and initiated the refund. I didn't. I called PayPal and they bluntly said that this is an ebay issue and that they're not involved. This is despite the fact that they froze the funds in my account. They straight up said they aren't involved. Both eBay and PayPal are complete shit and shouldn't be trusted. The fact that they cornered the market allows them to do this kind of crooked shit. It's absolutely ridiculous and I'm not paying the balance. They can close my accounts at this point. I don't give a shit.