You should feel comfortable at JOYCE.
Therefore you can easily end unsolicited conversations. To do so, please click on the button 'End conversation' at the bottom of the ClubMail. The conversation will then be automatically ended for 30 days. The other profile will receive an info.
If you don't want to be contacted anymore, you can also ignore the profile.
The other member will not be able to write to you or visit you anymore.