I had the occasion on eBay where the product I received was not as described so I started a case through eBay.
The seller was very unresponsive. After opening the case the seller agreed for a refund after the item is returned.
I get an email from eBay saying that the "seller is unable to provide a shipping label" and I should contact the seller and return the item. I even called eBay's customer service to confirm it.
So the seller asks me to ship the item back and he will refund it.
The item is returned and seller is unresponsive. I contact eBay and they say in a very monotonous voice that they will step in and only refund me the original price and original shipping only but not return shipping as that is out of eBay.
How can it be out of eBay it was eBay who asked me to ship the item to the seller!
And nowhere in any emails from eBay did they ever mentioned that I should not pay for the return shipping.