Hello. Currently there are a lot of curation groups and whales curating amazing content, there's no need to buy votes. The downvote you received is to discourage the buying of votes from bidbots. We kindly invite you to join us on the #NewSteem attitude, where good content receives votes and the organic content get the most attention. Buying votes hurts you, other authors and the Steem Ecosystem in general, please don't do it.
He is a serial abuser. Your gonna have to hit him harder
Thanks for the info. As a personal rule, we are trying to make them stop before downvoting them full power and taking their posts to 0.