just after one month it is already having a much better effect
Yeah, because your bullying them with massive downvotes. And apparently you're proud of it. Sad!
You see, you could show some patience and take it slow. If I was in your shoes, I would leave tiny upvotes and a comment, like so:
"I really liked your post and would have given you an X% upvote instead of the 1% token. I was even considering following you, but I noticed you have bought votes for your post. So I guess you don't need my support."
That's how you teach an old dog new tricks. Use a stick, and it might get you bit instead.
We actually do these comments with curangel - if we would have upvoted it. Would be somewhat dishonest to tell every vote buyer that he would have received an upvote if he didn't do that, no?