Truthfully, did not know a seller can "block" a return/refund.....
Try catching up on the protocol for returns....
Let the seller know by opening a request
If you want to return an item, or if something's gone wrong with your order, the first step is to open a request from your Purchase history. Most sellers are happy to work with you, but if you're unable to resolve an issue or the seller doesn't honor their stated return policy, you may be eligible for eBay Money Back Guarantee.
Get help with an item that hasn't arrived
If you haven't received your item, you can check to see when it's due to be delivered. If the estimated delivery date has passed and you're still waiting, report that your item hasn't arrived so the seller can help you out.
Return an item for a refund
If you've changed your mind about an item, check the listing for full details of the seller's return policy. Most purchases are covered by eBay Money Back Guarantee, which means that if the item arrives damaged, is faulty or doesn't match the listing, you can return it for a refund – even if the seller doesn't accept returns.
Get help if you bought as a guest
If you bought an item on eBay as a guest, you can still request a return or report that an item hasn't arrived, and the seller should help resolve your issue.
OR......
If the seller wasn't able to help, ask eBay to step in
Most of the time sellers will be able to resolve your issue, but if they haven't responded after 3 business days or they haven't been able to fix things for you, we're here to help.
Ask eBay to step in and help for buyers
When we step in, we'll review the details of your case and get back to you and the seller with our resolution. For more information about how eBay decides the outcome of a case, see eBay Money Back Guarantee.
Appeal the outcome of a case as a buyer
If you disagree with our resolution after we've stepped in, you can ask us to take another look. You'll have to provide additional details, such as photographs showing what's wrong with the item.
