How to report cheating

[MathWiz20]

There is someone (who I will not mention name here) who I have reason to believe has lately cheated to get his/her rating up quickly and on to the cyber battles high scores over the past few days/possibly a week or so.

How do I report this, or maybe I should say where do I report this?

[matlu]

either send me private post on the forum, or send me an email

[MathWiz20]

Thanks for your help matlu, I'll give you my evidence and hopefully I'm not wrong.