You can use the report button to report private messages the same way you report forum posts. If you haven't deleted it yet, please do so so that the message in question is relayed to us.
EDIT: By please do so I mean reporting it. Sorry for being ambiguous.
EDIT: The user in question has been taken care of. Thank you for the information.
Could you please reupload this?
https://www.anime-sharing.com/threads/☄%EF%B8%8Frelease☄%EF%B8%8F-211211-rj354724-幻霜夜会-universe-prison-ユニバースプリズン-vjh2-0.1464593/
Hello, can you please reupload in Mexashare or Katfile
https://www.anime-sharing.com/threads/200228-poro-のぞき彼女-上書き性服・楓~剥がれ注ぐおじさん棒~.926121/
https://www.anime-sharing.com/threads/191227-poro-のぞき彼女-「見つめる優等生・楓~転がり堕ちる如雨露」-no-watermark.903452/