returned faulty item requested full refund and only got partial refund

[shark300]

Hi how do i open a case against ebay seller?

[davewil1964]

You probably can't now.

You no longer have the item, and it has probably timed out on eBay. Paypal might work - I'm not sure how they view proof of return prior to opening a case.

The time to open a case is before returning a faulty item.