Afraid this one is not removable, being the consequence of sending the wrong item. It upset your buyer and they left honest feedback about it.
Though it may feel unfair that they didn't give you an opportiunity to make it right before rating you, buyers are not under an obligation to do so. Making it right by correcting the error does not necessarily erase the fact that the buyer’s needs were not met.
Would i have negged you over a momentary lapse like this? No. It was an honest mistake. Unfortunately, your buyer felt differently.
As for the follow-up comment, i would not have included the phrase: “Its unfortunate that you didnt even give us the chance to make it right but instead just left negative feedback.” because it sounds a bit defensive, and the important audience here is not the current buyer, but future buyers. The rest of your comment was excellent.
The follow-up comment to a neg is one of the most valuable pieces of real estate on eBay. This is where a seller can utterly disarm any negative fallout by showcasing their customer service skills. You did this and have continued to sell well despite the neg. So don’t sweat it. This neg will not hurt your sales.
