
Oh, to do that you get ALL the readers to report the manga. I think it happened with Dear Door, where people started to spam in the comments in alerting other readers how the chapter was uploaded without authorization. We managed to get rid of 5-6 chapters from Toxic Scans who, as their name says, were toxic as hell.
That's a lot of work, I know, but that's the only way I've seen chapters be deleted.

Thank you for this wonderful idea, it’s so chaotic (in a good way) and I could see this working. There was a point where every other comment was calling us out, BUT fortunately the dust has settled so I don’t think we’ll have enough people... Mangago is just infuriating.
Don’t worry though. We still will have it removed when it’s overwritten by “official” scans hopefully within this week. Ty again.
Unfortunately, our chapter is still up. We wanted deleted today but Mangago won’t listen. So... all we can do is wait for Ocean Scans to finish their versions (we do not know how long this will take).
You can read everything that lead up to this point on by clicking my profile!!
I will be offline for a few hours tomorrow, please don’t start a fire. Once again, are not here for trouble. If you have any questions just let me know.