I got an unfair negative for one of my sales (not card related), and ebay didnt reverse it. I dont know why this guy thinks they will reverse yours...
There is no chance of them removing. This moron thinks he is smart and will trick the op into changing it. In reality if the op reported that message more than likely the seller will be suspended.
Leave that negative to warn others but more importantly to piss him off and make him waste his time on the phone with eBay who will laugh at him