Hi,
you have three options:
1. Tap the report button - if 6 other people also do this within 24 hours he/she will be banned from global for a day - no one in support will see the report.
2. If you believe they have broken the terms of service then you can screen shot and send it to support in game > cog icon on the right > help and support > contact us - a support person will see this usually within 24 hours. It would be helpful if you were to also screen shot the person's profile.
3. If the person is breaking any laws i.e. grooming an underage person I would encourage you to screen shot it/the players profile and contact your local law enforcement.
Hope that helps.

