Ok, get a screenshot of the chats and player list that shows their name, clan and Funcom ID. Then submit a ticket through Zendesk.
The Funcom ID and screenshots of chats are very important.
Do not talk to them. Ignore them. Play as normal with your usual interactions.
Keep in mind Zendesk might not be able to do anything if it doesn’t actually break any rules. Read the Terms of Conduct, Guidelines and Procedures to see if they’re doing anything listed and mention it in your report.