Selling accounts on this forum is highly discouraged as the bought account can be abused easily by scamming others or spamming the forum. Hence, the trust was added to your account by KWH. As I see his ratings, it was a neutral one but since you too left him ratings, he left you a negative rating. Not sure if it would be removed but you would need to request him to do so by sending him a PM. Posting openly about it wouldn't help much but rather try solving this issue privately.
Thanks man I understand that selling account is not good for me and for this community too. I've sent him messages many times to remove it as I'm not selling this account now but he is neither replying to my messages nor removing negative feedback. What could I do now to get positive feedback as I want to sell my services here in near future. Any advice?
I think is too late now, he only gave you a
NEUTRAL feedback so it would not have any impact on your account but it seems like you gave him a fake
NEGATIVE as revenge and this is not ok, you should have asked him first to remove it or at least to give you a second chance before you left this negative feedback, now it's too late i think
Proof you will be a good member here and maybe in the future he will remove it from your account
I've sent him pm many times neither I've got any reply from him nor he removed his feedback.
He prolly won't remove that negative feedback. Unlike his neutral feedback which he may have removed eventually (assuming that you don't sell your account or engage in account trading in the future), that negative feedback is based on your verifiable abuse of the Trust Rating system, which is a malicious act that proves that your trustworthiness as a member is suspect, if not completely nonexistent. Essentially, he doesn't trust you. Unfortunately for you, he is in the DT tree, which makes his feedback more relevant.
If the negative trust rating is really an issue, then just ask your trading partners to read up on your received feedbacks before trading so they can see what you were negged for and decide whether to trust you or not accordingly.
You just mentioned that you sell accounts though. I don't know what accounts you are selling, but I've never heard of any service which allows anyone to sell or trade their accounts legally, so you prolly won't get even the neutral account removed. All things being fair, you should prolly get negged for account selling as well.