P.S. If this was the seller in China, who you left the positive for , with the follow up you wished you could change it to a neg,  they never had any intention of giving you any part refund. It was a tactic to string you along until it was too late to open an official eBay dispute

If the item is not as described, do it now

And don't communicate with them any further, regardless of what excuses or promises they make